MR750_扫描界面
GE MR750 简介
Penetration Cabinet
Power Cabinet
MDP
New
Modified
Un-changed
Jan 2010 Rev 6
System Re-architecture Approach
Operator room – Discovery and Optima
Scan Room Display Converter*
Cryo Cooler
Cabinet I/O
CAM CAM
Cryo Cooler
Cryo Cooler
XG A
XG A
XG A
RF Amp*
Cooling Loop 1
Cooling Control
Scan Room PS**
XG A PS XG A PS XG A PS
MNS BB RF Amp*
Primary Display Host PC
SCIM
Intercom
MOD (no longer available)
Jan 2010 Rev 6
Same - a little more detail…
Equipment room
Term Block I/O XG A Cabinet I/O XPS Broadban d RF Amp Power Distribution PDU XPS XPS XG A XG A Cabinet I/O
Just touch and go
Volumetric vascular (run-off) scan
Jan 2010 Rev 6
The DV / DVMR / TNT / Data:
• • • • • • • • • • Scope – complete system change except magnet More than two times bigger than average MR programs More than 4500 parts (versus HDx 900 parts) 10,000 drawings Approximately 200 FRUs (versus HDx 125, VCT 120) More than 1,000 service documents Resource peak at nearly 400 Managed many technical risks New siting requirements, and design and training challenges Driving to new Reli standards; total systems view with proactive reli growth (reli budget of $1.8M + $600K P&E)
中国脑成像联盟首批临床科研型功能磁共振成像数据采集标准介绍
二、标准化参数的比较与测试
• 信噪比与成像线圈 • 多中心数据一致性验证－任务态fMRI • 多中心参数验证
信噪比与成像线圈
• 不同成像线圈比较 • BOLD图像信噪比 • DTI图像信噪比
不同成像线圈比较
MR 750
Prisma
BOLD图像信噪比
Noise
信 噪 比 测 量 示 意 图
Noise
123 - 155 mm 136.96± 5.03 mm
磁共振多模态标准化扫描参数
• T1(3D)扫描参数 • BOLD扫描参数 • DTI扫描参数 • 场图(field map)扫描参数 • T2(3D)扫描参数
T1(3D)高分辨率结构像
T1(3D)扫描参数
Scanner Sequence FOV (mm2) SliceThickness (mm) Gap (mm) SliceNum. TR (ms) TE (ms)
TR (ms) TE (ms) Phase partial Fourier Matrix PhaseDir. iPAT/Aset b0 Num. b (s/mm2) b Num. BandWidth VoxelSize (mm3)
Coil TA
Prisma
8000 64 6/8
2/24 10 64 2030 Hz/px 64CH/20CH 10m18s
Coil Scans
TA
Prisma
MR 750
2368 Hz/px 250 KHz
64CH/20CH 8CH/32CH
8m6s
8m
Ingenia
Trio Tim
224 × 224
3.5
0.7
33
Interleaved
3D Bravo、3D Cube Flair两种MR增强扫描序列用于肺癌脑转移病灶的检验能力比较
64·罕少疾病杂志 2022年06月 第29卷 第 6 期 总第155期【第一作者】李 艳，女，技师，主要研究方向：磁共振。
E-mail：********************【通讯作者】李 艳·论著·3D Bravo、3D Cube Flair两种MR增强扫描序列用于肺癌脑转移病灶的检验能力比较李 艳*安阳市人民医院医学影像科 (河南 安阳 455000)【摘要】目的 探讨3D Bravo、3D Cube Flair两种MR增强扫描序列用于肺癌脑转移病灶的检验能力。
方法 选择我院肿瘤科2016年1月至2020年1月期间收治100例肺癌脑转移病灶患者为研究对象，全部观察对象均分别接受本研究方案的MR增强扫描，对比两组检查技术的检出情况、判读结果和信号强度。
结果 3D Bravo MR增强扫描对于脑膜转移和脑内转移的临床检出率均明显高于3D Cube Flair MR增强扫描，两种方法病灶部位检出数据对比差异具有统计学意义(P <0.05)，3D Bravo序列检出率为93.2%，漏诊率6.8%，误诊率为0.4%，3D Cube Flair序列检出率96.8%，漏诊率3.2%，误诊率为1.4%，数据分析结果比较差异具有统计学意义(P <0.05)，两种序列的图像质量都比较理想，但部分患者可见伪影情况，3D Bravo和3D Cube Flair序列图像测量的信号强度CR 符合正态性分布特征，但两者病灶与正常灰质、病灶与正常白质的信号强度对比差异具有统计学意义(P <0.05)。
结论 3D Cube Flair序列MR增强扫描用于肺癌脑转移病灶的检查和诊断，应用效果较好，但3D Bravo与3D Cube Flair序列联合应用能够提高检查的可靠性。
【关键词】3D Bravo序列；3D Cube Flair序列；MR增强扫描；肺癌脑转移病灶【中图分类号】R814.43【文献标识码】ADOI:10.3969/j.issn.1009-3257.2022.06.023Comparison of 3D Bravo and 3D Cube Flair Enhanced MR Sequences in Detecting Brain Metastases from Lung CancerLI Yan *.Department of Medical Imaging, Anyang People's Hospital, Anyang 455000, Henan Province, ChinaAbstract: Objective To evaluate the ability of 3D Bravo and 3D cube flair enhanced MR sequences in detecting brain metastases from lung cancer. Methodsfrom January 2016 to January 2020, 100 patients with brain metastases from lung cancer in our hospital were selected as the research objects. All the observation objects received the enhanced MR scanning of this research scheme. The detection, interpretation results and signal intensity of the two groups were compared. Results MR scan was significantly higher than that in 3D cube flair enhanced MR scan, and the difference was statistically significant (P <0.05). The detection rate of 3D Bravo sequence was 93.2%, the missed diagnosis rate was 6.8%, the misdiagnosis rate was 0.4%, the detection rate of 3D cube FLAIR sequence was 96.8%, the missed diagnosis rate was 3.2%, and the misdiagnosis rate was 1.4%, The difference of data analysis results was statistically significant (P <0.05). The image quality of the two sequences was ideal, but artifacts could be seen in some patients. The signal intensity CR measured by 3D Bravo and 3D cube flair sequences was consistent with the normal distribution characteristics, but the lesions of the two sequences were similar to those of normal gray matter and gray matter There was significant difference in signal intensity between lesions and normal white matter (P <0.05). Conclusion 3D cube FLAIR sequence enhanced MR scanning has a good effect in the detection and diagnosis of brain metastases of lung cancer, but 3D Bravo combined with 3D cube FLAIR sequence can improve the reliability of the examination.Keywords: 3D Bravo Sequence; 3D Cube FLAIR Sequence; Contrast Enhanced MR Scan; Brain Metastases of Lung Cancer 肺癌是一种临床上较为常见的恶性肿瘤疾病，且晚期肺癌患者存在较高的远处转移风险，这也会直接增加患者的死亡风险，并对其预后造成不良影响。
GE型号MR产品使用指南说明书
INTRODUCTIONThese magnetic resonance (MR) protocols were developed by an expert consensus panel for use on General Electric (GE) MR imaging machines, and were developed for high-end platform scanners with multichannel phased array coils and parallel reconstruction capabilities. The protocols are divided into 3 sections:•Body MR imaging•Body MR angiography•Central nervous system (CNS) MR imagingThe protocol parameters can generally be adapted to work with other software platforms or releases and hardware configurations but may require small modifications that can be made by a knowledgeable and experienced MR technologist. Scan times may increase in some circumstances.These protocols provide field strength–specific parameters for 1.5T and 3T. Attention has also been given to patient preparation, streamlining the exam, and making the best use of contrast material, whether it is a standard gadolinium-based extracellular fluid agent, a high-relaxivity gadolinium-based contrast agent (GBCA), such as MultiHance® (gadobenate dimeglumine [Gd-BOPTA]), or agents with hepatobiliary uptake such as Eovist®(gadoxetic acid) and MultiHance®.Each protocol contains a brief description of patient preparation, special notes on coil choice and placement, suggestions for contrast dose and administration rate, and suggestions concerning timing of fluoroscopic triggering, if appropriate.The consensus panel consisted of the following experts in radiology:Thomas Grist, MD University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin Mark C. DeLano, MD ̶ Michigan State University, Advanced Radiology Services, PC, Grand Rapids, Michigan Scott B. Reeder, MD, PhD ̶ University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin Howard A. Rowley, MD ̶ University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin Steffen Sammet, MD, PhD, DABR, DABMRS, FAMP ̶ The University of Chicago Medical Center, Chicago, Illinois Megan E. Vadnais, BSRT, (R)(MR) ̶ University of Wisconsin School of Medicine and Public Health, Madison, WisconsinDisclaimerThe content and views presented in this educational activity are those of the authors and do not necessarily reflect those of Medical Education Resources, ABC Medical Education, and/or Bracco Diagnostics Inc. The authors have disclosed if there is any discussion of published and/or investigational uses of agents that are not indicated by the US Food and Drug Administration (FDA) in their presentations. The protocols presented here were developed for pediatric and adult patients of average weight.Before prescribing any medicine, primary references and the full prescribing information for each product should be consulted. Any procedures, medications, or other courses of diagnosis or treatment discussed or suggested in this activity should not be used by clinicians without evaluation of their patient’s conditions and possible contraindications or dangers in use, review of any applicable manufacturer’s product information, and comparison with recommendations of other authorities. The information presented in this activity is not meant to serve as a guideline for patient management.Off-Label StatementThis educational activity contains discussion of published and/or investigational uses of agents that are not on-label by the FDA. The opinions expressed in the educational activity are those of the faculty. Please refer to the official prescribing information for each product for discussion of approved indications, contraindications, and warnings. Further, participants should critically appraise the information presented and are encouraged to consult appropriate resources for any product or device mentioned in this activity.MR Protocols for Body MR ImagingContrast timing is extremely important for abdominal MR imaging, particularly for high-quality liver imaging. We recommend the use of fluoro-triggering or “SmartPrep” methods rather than the use of a timing bolus.All body MR imaging protocols presented here were developed by Scott B. Reeder, MD, PhD, Steffen Sammet, MD, PhD, DABR, DABMRS, FAMP, and Megan E. Vadnais, BSRT, (R)(MR) for 1.5T and 3T systems. Specific protocols include:•Abdomen‒ Generic Abdomen Pelvis 1.5T and 3T‒ Appendicitis Noncontrast 1.5T and 3T‒ MR Enterography 1.5T and 3T•Liver‒ Liver/Pancreas Extracellular Agent 1.5T and 3T‒ Liver/Pancreas Hepatobiliary Agent 1.5T and 3T‒ Magnetic Resonance Cholangiopancreatography (MRCP) Noncontrast 1.5T and 3T‒ Diffuse Liver Disease 1.5T and 3T•Pelvis‒ Generic Pelvis 1.5T and 3T‒ Female Pelvis Malignant 1.5T and 3T‒ Female Pelvis Benign 1.5T and 3T‒ Uterine Anomaly 1.5T and 3T‒ Rectal Cancer 1.5T and 3T‒ Perianal Fistula 1.5T and 3T‒ Prostate 1.5T and 3T•Adrenal and Renal‒ Adrenal 1.5T and 3T‒ Renal 1.5T and 3TGeneral Notes•Intravenous access should be obtained with an 18- to 22-gauge needle•We suggest the use of a contrast injector and a saline flush of a minimum of 20 to 30 mL at the same injection rate as the contrast injection (1.5-2.0 mL/sec)•Breath-holding is essential for good image quality for thoracic or abdominal MR imaging. Precontrast scans should be used to ensure that the patient can both breath-hold adequately and understand the instructions. We recommend breath-holding at end-expiration (end tidal volume)•When parallel imaging is used, care must be taken to increase the field of view sufficiently to avoid residual aliasing artifact. This is generally more often a problem for coronal imaging, which may require placing the arms over the head or elevating the arms by the patient’s side•In patients with renal failure, consider using a half-dose (0.05 mmol/kg) of a high-relaxivity Group II contrast agent such as MultiHance® (gadobenate dimeglumine), particularly at 3TMR Protocols for Body MR AngiographyAll protocols should use Fluoro-Triggered (FT) magnetic resonance (MR) angiography fluoroscopic imaging for bolus detection. MR imaging protocols for MR angiography presented here include 1.5T and 3T systems, and were developed by Thomas Grist, MD, and Megan E. Vadnais, BSRT, (R)(MR) for the following procedures:•Cardiac MRA–Cardiac Basic Anatomy and Function 1.5T and 3T–Pulmonary Artery 1.5T and 3T–Pulmonary Vein Mapping 1.5T and 3T•Thoracic MRA–Thoracic Aorta MRA 1.5T and 3T–Gated Thoracic Aorta 1.5T and 3T•Abdominal MRA–Contrast-enhanced MRA Abdomen 1.5T and 3T–Noncontrast-enhanced MRA Abdomen 1.5T and 3T–Thoracoabdominal Aortic Aneurysm MRA 1.5T and 3T•Peripheral MRA–Lower Extremity Contrast-enhanced MR Venography (CE MRV) 1.5T and 3T–Runoff Abdomen to Lower Extremity MRA 1.5T and 3T–Peripheral Runoff Noncontrast 1.5T and 3T–Arteriovenous Malformation (AVM) Evaluation 1.5T and 3TThe rationale for the patient preparation for contrast-enhanced MR angiography is based on a hypothetical generic patient. Individual protocols may include important variations and will be delineated in the specific protocol. General Notes•Intravenous access should be obtained with an 18- to 22-gauge needle, inserted preferably in the antecubital fossa. Right side is preferred (when possible) for thoracic or carotid MR angiography•Use respiratory bellows – gating parameters:–R-R intervals = 2-3–Trigger point = 40%–Trigger window = 30%–Delay = minimum•The basic sequences recommended are intended to achieve both anatomic localization and high-quality anatomic imaging to complement the angiographic sequences that are performed. These include:–3-plane localizer–Coronal single-shot fast spin-echo (FSE)–Axial T2 FSE (respiratory triggered)–3D (three-dimensional) contrast-enhanced MR angiography FT (precontrast-practice breath-hold)–3D contrast-enhanced MR angiography FT (postcontrast)–3D contrast-enhanced MR angiography FT (2nd postcontrast)–Axial fast spoiled gradient-echo postcontrast fat-saturated•A power injector is highly recommended with a minimum of 20- to 30-mL saline flush delivered at the same injection rate as the contrast injection•Breath-holding is critical to good image quality for thoracic or abdominal MR angiography. Precontrast or practice scans help ensure that the patient can both breath-hold adequately and understand the instructions•When parallel imaging is used, care must be taken to not have wraparound artifact on the vascular structures. This generally requires prescribing a large field of view beyond the body wall, and for abdominal imaging, it requires placing the arms over the head or elevating the arms at the patient’s side. When performing the calibration scan, overprescribe by one-fourth the area of interest in the superior and inferior directions to reduce scan cutoff. Calibration scans are performed in the axial plane MR Protocols for Central Nervous System (CNS) MR Imaging Newer hardware and software platforms at both 1.5T and 3T allow efficient protocol options for a wide range of CNS indications. This section suggests multiple consensus methods for optimizing examination of patients undergoing MR imaging in the CNS. Core sequences in each protocol are identified, and their aggregate use constitutes a complete examination for each protocol. Alternative sequences of interest are included for emerging technologies, specific target anatomy, or subspecialty preference.1.5T and 3T CNS MR imaging protocols presented here were developed by Howard A. Rowley, MD, Mark C. DeLano, MD, and Megan E. Vadnais, BSRT, (R)(MR) for the following procedures:•Brain–Routine Adult Brain 1.5T and 3T–Brain Neck Magnetic Resonance Angiography (MRA)/Magnetic Resonance Venography (MRV) 1.5T and 3T –Motion Brain 1.5T and 3T–Routine Stroke Fast 1.5T and 3T–Hyperacute Stroke Brain 1.5T and 3T–Tumor Brain 1.5T and 3T–Multiple Sclerosis Brain 1.5T and 3T–Pediatric Brain 1.5T and 3T–Epilepsy Brain 1.5T and 3T•Specialty Brain–Hydrocephalus Brain 1.5T and 3T–Cerebrospinal Fluid Flow 1.5T and 3T–Pituitary 1.5T and 3T–Cranial Nerves/Internal Auditory Canals 1.5T and 3T–Vessel Wall 1.5T and 3T•Head and Neck–Orbits 1.5T and 3T–Soft Tissue Neck 1.5T and 3T–Sinuses/Face 1.5T and 3T•Spine–Cervical Spine 1.5T and 3T–Lumbar Spine 1.5T and 3T–Thoracic Spine 1.5T and 3T–Routine Total Spine 1.5T and 3T–Focused Total Spine 1.5T and 3T–Specialty Spine 1.5T and 3T–Brachial Plexus 1.5T and 3T–Lumbar Plexus 1.5T and 3TGeneral CNS Protocol Notes•Standard brain. There are multiple approaches to obtain various tissue parameter weightings at both1.5T and 3T, such that “standard” imaging refers more to the general-purpose nature of the protocolrather than the core sequence choices. The core preferences of our consensus panel are indicated within each protocol•T1.Six techniques for obtaining T1-weighting are included: spin echo (SE), fast spin echo (FSE), T1 fluid-attenuated inversion recovery (T1-FLAIR), 3D IR-prepared FSPGR (BRAVO), 3D T1 CUBE, and magnetization transfer (MT)–SE is the T1 reference standard for image contrast at 1.5T, although the other sequences have unique advantages and are included as options. Due to T1 prolongation at 3T and associated loss of gray-white contrast there is no consensus standard for T1-weighting, and many sites use inversion recovery preparation to restore tissue contrast–FSE with its intrinsic magnetization transfer effects results in decreased gray-white contrast but may depict contrast enhancement to better advantage–T1-FLAIR and BRAVO are inversion prepared, facilitating excellent gray-white differentiation but with the potential disadvantage of inconspicuous contrast enhancement due to the marked precontrast hypointensity of many lesions and subsequent isointensity to surrounding brain postcontrast –BRAVO, as a standard 3D sequence, has the key advantage of multiplanar reconstruction capability of the isotropic data sets, and excellent gray-white contrast desirable for most applications –T1 CUBE. This T1-weighted FSE-based volumetric sequence can be performed either before or after contrast. Beyond the usual 3D attributes (such as high resolution and multiplanar reconstructions), it has particular advantages postcontrast, where it provides black blood imaging, supports fat saturation, and shows outstanding tissue contrast for enhancing lesions. T1 CUBE is suitable for routine brain imaging and also orbital, cranial nerve, and vessel wall imaging exams. Many sites now use T1 CUBE as a supplement to postcontrast T1 BRAVO and other sequences–MT is an optional feature that can be added to increase contrast enhancement conspicuity on SE imaging, but at the cost of increased SAR and decreased gray-white distinction•T2. Most sites use FSE sequences rather than SE. PROPELLER is effective for dealing with patient motion, and is the primary FSE sequence used at many sites. Some users add fat saturation to T2 imaging as an option•T2-FLAIR.Improves lesion detection particularly at the brain-CSF interface. When done as the first sequence postinjection, postcontrast T2-FLAIR imaging effectively inserts a time delay for subsequent T1-weighted scans, which improves lesion detection on subsequent T1 imaging. The T2-FLAIR images also have some intrinsic T1 contrast that allows visualization of both edema and enhancement on one sequence for many lesions. Both 2D and 3D T2-FLAIR sequences are commonly performed, with the advantage of multiplanar reconstruction capability and fewer CSF pulsation artifacts of the 3D CUBE •Susceptibility. Due to the reduced susceptibility weighting of FSE methods, a T2*-GRE sequence can be added as an option to detect blood products and calcium. The SWAN sequence has been shown to more sensitively detect subtle areas of blood and calcium and has become a common protocol choice•Diffusion. Most brain protocols include a diffusion-weighted imaging sequence that is useful for stroke, infection, and tumor imaging. Apparent diffusion coefficient maps should be included to assess T2 shine-through. In areas near the skull base or orbits, PROPELLER DWI can be a good option to reduce signal pile-up and geometric distortion artifacts•Perfusion. Dynamic susceptibility contrast, perfusion-weighted imaging is becoming increasingly important and can provide clinically significant information regarding blood volume and/or transit time for both stroke and tumor imaging. Arterial spin labeling is also an option for assessing cerebral blood flow at 3T, but must be obtained precontrast•Contrast. The protocols presented here do not list separate imaging sequences for postcontrast imaging; rather, the T1-weighted sequence of choice is typically repeated after contrast agent administration. Most neurologic sequences with contrast are acquired with at least a 3- to 5-minute delay after injection to optimize visualization of disorders of the blood-brain barrier. Some protocols use more than one sequence “family” postcontrast, such as T2-FLAIR, T1-BRAVO, and T1-CUBE Fat Sat due to their complementary information. Many centers prefer routinely acquiring such volumetric series postcontrast to facilitate retrospective multiplanar reconstructions, treatment planning, and neuronavigation applications. T2-FLAIR is an excellent complement to T1 series, and may be done first postcontrast to intentionally provide a time delay before the T1 series are acquired. The method of injection is not important in these cases, and manual injection is typically used. However, power injectors are needed for contrast-enhanced MR angiography and perfusion imaging. Rates of injection vary, but 4 to 5 mL/sec is standard for perfusion, and 1.5 to 2 mL/sec is used for MR angiography. Dosing is weight based and at 0.1 mmol/kg for most protocols aimed at standard extracellular fluid distribution. The dose for an individual injection may be lower for first-pass MRA or perfusion exams, where a split-dose protocol can often be used, keeping overall dose within the standard 0.1 mmol/kg guideline. The ACR has recommended that the lowest dose feasible be used for diagnostic purposes. Because standard dosing recommendations are mostly influenced by lean body mass, and ECF volume in fatty tissues is low, some sites cap the upper limit of contrast for heavier adults at 20 mL total, especially when a high-relaxivity agent is being used.A useful contrast dose calculator (“GadCalc”) is available at https:///contrastCorner/ gadcalc.php and is also available for free download at the Apple and Droid App Stores.。
MR扫描参数
Series Mode Coil Imaging Options Echoes TE TR TI FA
M R(GE 1.5 Signa )扫描参数
FRFSE-XL 2D HEAD FC、VBw、TRF、Fast
1 102 3000
ETL BW Fov/Thk/S Freq*Phase
31.25 36/8.0/2.0 256*128
NEX Pfov FD FCD
1 0.75 R/L Autoshim
7
M R(GE 1.5 Signa )扫描参数
Cor T2 SSFSE
Series Mode Coil Imaging Options Echoes TE TR TI FA
SE 2D TPUPPER Fast、SS
ZIP512、ZIP2
1
NEX
Min mum
Pfov
340
FD
FCD
20
15.63 24/1.4/0/70 256*192
1 0.88 A/P
2
M R(GE 1.5 Signa )扫描参数
2D PRESS MRS
Series Mode Coil Imaging Options Echoes TE TR TI FA
1 90 2000
ETL BW Fov/Thk/Sp Freq*Phase
31.25 36/5.0/1.0 256*128
NEX Pfov FD FCD
1 1
Autoshim
MRCP SSFSE
Series Mode Coil Imaging Options Echoes TE TR TI FA
SE 2D TPUPPER VBw、Fast、SS
MR750_IDeal
*GE Healthcare Discovery MR750w 1Discovery MR750DISCOVERY MR750三点法非对称回波水脂分离成像IDeal, IterativeD ixon water-fat separation withE cho A symmetry and L east-squares estimatio*GE Healthcare Discovery MR750w三点法非对称回波水脂分离，IDeal水脂分离IDeal 成像•IDeal 成像基本原理•IDeal 高场磁共振技术应用优势•IDeal 脉冲序列常用扫描参数水脂分离与脂肪抑制的临床应用MR750IDEAL 水脂分离，一次扫描四种组织对比度。
DIXON与IDEAL水脂分离成像理论基础通用电气磁共振应用学院系列教材水脂分离成像原理：•DIXON，经典的两点法水脂分离技术。
•IDEAL，非对称回波三点法水脂分离。
1.相对于IR序列不影响纵向磁化2.对磁场不均匀的影响不敏感对称回波两点法水脂分离，DIXON3.相对于化学饱和法不受射频场均匀性的影响Delfaut, et al. Radiographics 1999;19:373-382通用电气磁共振应用学院系列教材三点法对称回波DIXON成像原理对称回波三点法DIXON成像特点：•水脂含量接近时分离得到的图像SNR非常差•水脂交界区域图像模糊、分离不完全说明：三点法对称回波采集时间点分别为（-2π/3，0，2π/3），水脂比例不同时，导致水脂分离不稳定或信号不稳定。
水信号分离准确性通用电气磁共振应用学院系列教材三点法非对称回波IDeal 成像原理非对称回波三点法IDealπ/2-π/67π/6成像特点：•非对称回波三点法成像采集信号的时间点偏移为 -π/6，π/2，7π/6，这种非对称的采集方式可以充分克服传统三点式DIXON方法的缺点，保证水脂分离的完全性和结构的清晰性。
惠普扫描仪使用手册
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3 故障排除 ...................................................................................................16 扫描仪初始化或硬件问题 ..........................................................................16 扫描仪操作问题 ........................................................................................17 幻灯片、底片和 TMA 问题 .......................................................................20
前面板和附件概述
本部分概述了扫描仪前面板和透明材料适配器 (TMA)。 ● 前面板按钮 ● 透明材料适配器 (TMA)
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说明 扫描图片、图形、文档或物体。
扫描胶片按钮 扫描透明正片（例如 35 毫米幻灯片）和底片。 扫描胶片需要使用扫描仪盖板下的透明材料适配 器 (TMA)。
注意 如果要在发送到目标位置之前预览扫描结果，请在 “HP 扫描”对 话框中选择“显示预览”。 另请参阅“预览扫描的图像”。
GE磁共振扫描操作界面介绍
定位线复制后的效果
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26 / GE Title or job number /
2020/2/24
加饱和带
预置饱和主要用于消除扫描视野 内或视野外的金属、运动伪影的 影响。 饱和带应尽量覆盖可能引入伪影 的位置，避开感兴趣的部位。
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选择饱和带窗口
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1 选中饱和带位置
2 在图像上点鼠标左
键，出现饱和带
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调节饱和带厚度
旋转
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示图……
增加层数
旋转角度
1 激活窗口中画定位线
，其它窗口调整位置
2 接受（可跳过）
3 保存
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如果需要改 变定位指示
图……
2 点“选择序列”键
1 激活需要置换图像的视窗
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1 选择要替换上去的序列
2 如果仅替换一个视窗，选“OK”；如果替换所有视窗，GE
Title
or
job
19 number
/ /
2020/2/24
选择“OK ALL”
增加层数
1 激活窗口中画定位线
，其它窗口调整位置
2 接受（可跳过）
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MR750通用电气磁共振应用学院系列教材扫描界面Scan InterfaceGE MR Application Team, China使用限制和提醒：1.任何磁共振的临床应用，必须在保证安全的前提下进行。
For GE Internal Use Only. Not for External Distribution.图像数据管理与后处理系统维护与管理•Patient Record: 病人信息记录•Views: 列表信息过滤•Find: 搜索病人信息•Search: 搜索RIS 登记病人信息•Source: 图像数据来源地•Exam: 检查•Series: 序列•Images: 图像•Service Desktop Manager: 系统维修界面•Error Log: 报错信息窗口•Gating: 心电呼吸门控设置•iLinq: 远程连接管理•Protocol Management: 扫描协议管理For GE Internal Use Only. Not for External Distribution.新建病人信息记录编辑病人信息记录复制病人信息记录删除病人信息记录时间和日期磁盘容量传输状态重建状态光盘刻录状态胶片打印状态系统报错信息新建病人信息记录编辑病人信息记录复制病人信息记录删除病人信息记录操作过程：选择搜索条件，输入信息，检索相应登记信息WORKLIST 搜索条件：•Name ：姓名•Patient ID: 患者编号•Date Range ：日期•This system ：本机•This Modality ：设备类型For GE Internal Use Only. Not for External Distribution.新建病人信息记录输入信息：•Name ：姓名•Patient ID: 患者编号•Weight ：体重，lbs ：磅，Kgs ：公斤•Date of Birthe ：出生日期•Age ：年龄•Sex ：性别•Scheduled Date ：预约日期•Exam Description ：检查描述•Operator ：检查技师•Radiologist ：放射科医生•Referring Physician ：申请医生•Protocol ：扫描协议•Favorite Protocols ：常用扫描协议•Show All Protocols ：显示所有扫描协议•Save ：保存•Cancel ：取消提示：点击列标题可以排序必须输入Patient ID 和Weight才能开始扫描。
For GE Internal Use Only. Not for External Distribution.新建病人信息记录编辑病人信息记录复制病人信息记录删除病人信息记录•选择WORKLIST登记的一条记录，直接输入体重。
•如果不需要额外编辑信息，则可选择Protocol进行扫描。
•点击编辑按钮，编辑病人信息，Exam Description输入检查描述。
•点击Show All Protocols选择扫描协议。
For GE Internal Use Only. Not for External Distribution.•显示所有扫描协议成人儿童扫描协议分组：•Head：头部•Neck：颈部•Upper Extremities：上肢•Chest：胸部•Abdomen：腹部•Spine：脊柱•Pelvis：盆腔•Lower Extremities：下肢•Other：其他•开始检查，进入序列扫描界面序列扫描状态Status：•Done：扫描完成•InRx：正在编辑•Act：正在扫描For GE Internal Use Only. Not for External Distribution.扫描安全性提示：•dB/dt：梯度切换率安全性•SAR：射频能量特异性吸收经安全性级别：•Normal：安全模式•First Level：标准一级模式扫描界面：•Task：扫描任务•Add Task：添加后处理任务•Save Rx：保存序列参数•Coil：线圈•Imaging Option：序列及成像选项序列参数界面：•Scan Plane：扫描平面•Freq FOV：频率编码视野•Phase FOV：相位编码视野•Slice Thickness：层厚•Freq Dir：频率编码方向•Locs Before Pause：扫描暂停之前扫描层数•TR：重复时间•Max # Slices：最大扫描层数•# of Acqs：采集次数•Rel. SNR：相对信噪比定位线空间位置信息：•S/I：上下•R/L：右左•A/P：前后•Center：中心位置•Spacing：层间隔•# Slices：层数For GE Internal Use Only. Not for External Distribution.•Coil：线圈及其名称•患者体位，点击箭头可以改变患者体位•Coil Selection，线圈分类及其名称•当前连接的线圈，自动识别•Prescription S/I Extents：定位线上下范围For GE Internal Use Only. Not for External Distribution.序列数据Series Data：•每一个打勾的序列将自动传输。
扫描序列右键菜单：•Cut：剪切•Copy：复制•Paste：粘贴•Duplicate：复制同时粘贴•Duplicate & Setup：复制粘贴同时打开序列参数界面•Move Up：上移•Move Down：下移•Create/Edit Link：创建和编辑定位线链接关系•Break Link：取消链接For GE Internal Use Only. Not for External Distribution.基本操作流程：•同时选择两个需要有相同定位线的序列，点击右键菜单，选择Create/Edit Link创建编辑链接。
勾选需要链接的内容：Scan Coverage，扫描范围Field of View，视野Slice Thickness，层厚Slice Spacing，层间隔SAT Bands，饱和带Shim Volume，局部匀场Auto Save，链接完成后自动保存序列•具有定位线自动链接关系的两个序列，出现链条图标。
For GE Internal Use Only. Not for External Distribution.序列参数界面：•Scan Plane：扫描平面•Freq FOV：频率编码视野•Phase FOV：相位编码视野•Slice Thickness：层厚•Spacing：层间隔•Freq Dir：频率编码方向•Locs Before Pause：扫描暂停之前扫描层数•TR：重复时间•# of Slices：定位线层数•Max # Slices：最大扫描层数•# of Acqs：采集次数•Rel. SNR：相对信噪比•Start：层面开始位置•End：层面结束位置•Acceleration：并行加速采集•Phase：相位加速因子•Advanced：用户控制变量•Chem SAT：化学饱和方法•FAT：频率饱和法脂肪抑制•FAT Classic：传统的频率饱和法脂肪抑制•WATER：频率饱和法水抑制•Contrast：勾选则为增强扫描序列，系统自动扫描至这个序列，则暂停扫描，提示注射造影剂。
For GE Internal Use Only. Not for External Distribution.•选择RxD序列，点击SCAN右侧的下拉菜单，则出现序列扫描控制按钮。
Prep Scan，准备扫描。
当需要开始造影剂注射计时，或当前序列需要屏气扫描Auto Prescan，自动预扫描。
系统自动开始匀场，寻找中心频率，调谐射频的发射与接收，再点击SCAN即可开始扫描。
当需要更好的匀场条件时，可点击此按钮，Manual Prescan，手动预扫描，可以观察射频增益大小、中心频率、匀场结果等•Analog Gain：射频模拟增益•Digital Gain：数字射频增益•Transmit Gain：射频发射增益•Center Freq：中心频率值•XYZ：梯度匀场值•中心频率预扫描界面分为Coasrse和Fine模式，右侧窗口中显示的频谱预扫描显示带宽不同。
•Rec：线圈通道提示：频谱曲线中竖直白线为中心频率位置，在Center Freq中直接输入数值可以改变中心频率值。
Delta Freq则对中心频率进行加减，点APPLY执行。
扫描界面右上角下拉菜单显示：•End Exam：结束当前检查•Patient Info：病人信息•Perferences：参数选项•Save as Protocols：将当前所有扫描序列存到扫描协议•Show Filmer：显示胶片Auto View 窗口：•Autoview：重建的图像自动显示，请保持此按钮始终处于选中状态。
•ReportCursor：显示光标在解剖结构上的空间位置。
•Auto W/L，自动调节图像显示的窗宽窗位，手动调节窗宽窗位之后，可将其关掉。
参数选项：•扫描模式：Clinical，临床模式；Research，科研模式•SAR，dB/dt，安全提醒界面•Auto Transfer by Exam，检查结束后自动传输图像•Auto transfer by Series，序列扫描结束后自动传输图像•Auto Archive，自动存储（已无作用）•Auto Table Movement：当扫描中心点上下移动距离不超过5厘米时，自动移床。
•Auto Calibration：线圈自动校准扫描。
序列控制界面：•End Exam：结束检查。
For GE Internal Use Only. Not for External Distribution.脉冲序列与成像选项：脉冲序列与成像选项：脉冲序列与成像选项：脉冲序列与成像选项：For GE Internal Use Only. Not for External Distribution.SAT：饱和带•S、I、A、P、R、L，分别为下、下、前、后、右、左。
•自动饱和带：直接点击按钮即可，此饱和带并不显示在屏幕上。
•手动饱和带：点选一个饱和带按钮，然后鼠标左键直接点击图像的相应位置，红色饱和带控制：•拉动圆点，旋转饱和带角度。
•拉动方点，增大缩小饱和带宽度。
•拉动饱和带边线，移动饱和带位置。
局部匀场。
显示局部匀场隐藏局部匀场For GE Internal Use Only. Not for External Distribution.右键点击适当的定位窗口，选择背景序列复制相应的二维或三维序列定位线。