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CAIPIRINHA – Revisited

November 18, 2015 by
The development ofmulti coil receiver hardware as well as dedicated parallel acquisition techniques (PAT) and respective reconstruction methods allowed for a significant decrease of acquisition times in almost all clinical applications. This article provides a brief overview of 2D- and MS-CAIPIRINHA. [...]
Filed Under: brain, Clinical Imaging, Clinical Methods & Techniques, Clinical Updates, New Technologies & Advances, the joints
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Accelerated Diffusion Tensor Imaging of Skeletal Muscle Using Simultaneous Multi-Slice Acquisition

December 18, 2015 by
Simultaneous multi-slice acquisition with CAIPIRINHA reduces the scan time in diffusion-weighted MRI. In this article, early experience with this technique for accelerated DTI of skeletal muscle is shown. [...]
Filed Under: brain, Clinical Imaging, Clinical Methods & Techniques, Clinical Updates, New Technologies & Advances, the joints
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Simultaneous Multi-Slice (SMS) Imaging for Pre-Surgical BOLD fMRI and Diffusion Tractography: Case Illustrations

December 29, 2015 by
The presented case studies illustrate that SMS can increase the statistical confidence of fMRI and diffusion tractography results. These gains may be used to increase spatial image resolution and coverage, to improve spatial coregistration to high-resolution anatomical scans for intra-operative neuro-navigation, and / or to shorten acquisition times. [...]
Filed Under: brain, Clinical Imaging, Clinical Methods & Techniques, Clinical Updates, New Technologies & Advances, the joints
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Quiescent Interval Single-Shot (QISS) Lower Extremity MRA for the Diagnosis of Peripheral Artery Disease: Case Presentations

December 29, 2015 by
Case presentation of non-contrast QISS MRA providing high diagnostic accuracy for the detection of hemodynamically significant arterial stenosis of the lower extremities at both 1.5 and 3T. [...]
Filed Under: brain, Clinical Imaging, Clinical Methods & Techniques, Clinical Updates, New Technologies & Advances, the joints
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Point-of-Care MR Imaging and How We can Learn from Other Imaging Modalities. Thoughts on a Potential New Strategy

November 18, 2015 by
The article introduces point-of-care MRI, an extremely focused and goal-directed examinations strategy, that could reduce examination time and patient comfort. [...]
Filed Under: brain, Clinical Imaging, Clinical Methods & Techniques, Clinical Updates, New Technologies & Advances, the joints
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Simultaneous Multi-Slice (Slice Accelerated) Diffusion EPI: Early Experience for Brain Ischemia and Cervical Lymphadenopathy

November 18, 2015 by
In single shot EPI, the entirety of k-space is traversed after one shot (excitation). Readout-segmentation acquires k-space in multiple shots for reduced TE and encoding time. Real-time reacquisition of unusable shots is also supported. [...]
Filed Under: brain, Clinical Imaging, Clinical Methods & Techniques, Clinical Updates, New Technologies & Advances, the joints
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Clinical Case: 3 Tesla MR Neurography-Guided Posterior Femoral Cutaneous Nerve Block

October 2, 2015 by
The high SNR available at 3T provides the ability to perform high-resolution MR neurography-guided perineural injections for highly accurate visualization of small nerve as well as needle targeting and perineural injection. This case report demonstrates how this techniques facilitates accurate targeting of the PFCN.  Download/View PDF [...]
Filed Under: brain, Clinical Imaging, Clinical Methods & Techniques, Clinical Updates, New Technologies & Advances, the joints
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Pelvic schwannoma

June 30, 2014 by
  Clinical History: 49-year old woman with an asymptomatic pelvic mass for 10 years (an incidental finding on routine physical examination)   Diagnosis: Pelvic schwannoma   MR Technique: Pelvic MR imaging was performed on a 3T system (Skyra, Siemens). (A) Coronal T2-weighted TIRM (TR/TE 4000/78ms), (B) sagittal T2-weighted TIRM (TR/TE 4000/70), (C) axial T1-weighted TSE […] [...]
Filed Under: Anatomic Regions, Cases, Clinical Imaging, Meet The Experts, pelvis, Xiaoming Li
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Brain abscess

June 30, 2014 by
Clinical History: This 5-year old boy presented with an acute headache and vomiting for 12 hours. The patient had a clinical history of cholesteatoma surgery in the recent past, involving the right mastoid.   Diagnosis: Brain abscess   MR Technique: Contrast-enhanced brain MR imaging was performed on a 3T system following an unenhanced CT scan […] [...]
Filed Under: Anatomic Regions, brain, Cases, Clinical Imaging, Meet The Experts, Xiaoming Li
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Proliferative myositis

June 30, 2014 by
  Clinical History: A 63-year old woman presents with an asymptomatic mass inferior to the right inguinal area for 10 days   Diagnosis: Proliferative myositis   MR Technique: Imaging of the right lower extremity was performed on a 3T MR system (Siemens Skyra). (A) Coronal T2-weighted TIRM (TR/TE 3000/38ms) and (B) axial T2-weighted TSE with […] [...]
Filed Under: Anatomic Regions, Cases, Clinical Imaging, Meet The Experts, soft tissues, Xiaoming Li
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Right renal angiomyolipoma

August 8, 2014 by
Clinical History: 59-year old woman with right lower back pain for more than one year   Diagnosis: Right renal angiomyolipoma   MR Technique: Upper abdominal imaging was performed on a 3T MR system. (A, B) Axial T1-weighted VIBE in- and out-of-phase (TR/TE 3.88/1.27ms), and (C) axial FS T2-weighted TSE (TR/TE 5814/78ms, with respiratory triggering) scans […] [...]
Filed Under: abdomen, Anatomic Regions, Cases, Clinical Imaging, kidneys, Meet The Experts, Xiaoming Li
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Left thigh schwannoma

August 8, 2014 by
  Clinical History: 31-year old woman with left foot numbness and pain for 6 months   Diagnosis: Left thigh schwannoma   MR Technique: Imaging of the left lower extremity was performed on a 3T MR system. (A) Coronal T2-weighted TIRM (TR/TE 3000/38ms), (B) sagittal T2-weighted TIRM (TR/TE 3000/38), (C) axial T1-weighted TSE (TR/TE 500/11) and […] [...]
Filed Under: Anatomic Regions, Cases, Clinical Imaging, Meet The Experts, soft tissues, Xiaoming Li
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Chronic osteomyelitis of the left femur

August 8, 2014 by
  Clinical History: An 11-year old boy with left thigh pain for 3 days   Diagnosis: Chronic osteomyelitis of the left femur   MR Technique: Imaging of the left lower extremity was performed on a 3T (Skyra) MR system. (A) Coronal T2-weighted TIRM (TR/TE 3000/38ms), (B) sagittal T2-weighted TIRM (TR/TE 2800/38), (C) axial T1-weighted TSE […] [...]
Filed Under: Anatomic Regions, bones, Cases, Clinical Imaging, Meet The Experts, Xiaoming Li
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Prostatic sarcoma

April 25, 2014 by
        Clinical History: 25-year old man with dysuria for 3 weeks   Diagnosis: Prostatic sarcoma   MR Technique: Prostatic imaging was performed on a 3T MR system. (A) Sagittal T2-weighted TSE (TR/TE 7500/104ms), (B) coronal T2-weighted TSE (TR/TE 7354/104ms), and (C) axial T2-weighted TSE (TR/TE 7440/101) were acquired prior to the administration […] [...]
Filed Under: Anatomic Regions, Cases, Clinical Imaging, Meet The Experts, pelvis, Xiaoming Li
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Cystosarcoma phyllodes of the breast (CSPB)

April 26, 2014 by
    Clinical history: 32-year old woman with a right breast mass   Diagnosis: Cystosarcoma phyllodes of the breast (CSPB)   Imaging techniques: Non-contrast MR imaging of the bilateral breasts was performed on a 3T MR system (Skyra, Siemens). (A) Axial T1-weighted TSE (TR/TE 626/8.1), (B) axial T2-weighted TSE with Dixon fat suppression (TR/TE 3700/101ms), […] [...]
Filed Under: Anatomic Regions, breast, Cases, Meet The Experts, Xiaoming Li
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Left thigh myxofibrosarcoma

April 26, 2014 by
  Clinical history: 52-year old man with left thigh mass   Diagnosis: Myxofibrosarcoma   Imaging techniques: Imaging of the left thigh was performed on a 3T MR system (Skyra, Siemens) and 64-MDCT (GE). (A) Coronal T2-weighted TIRM (TR/TE 3000/38), (B) sagittal T2-weighted TIRM (TR/TE 3000/38ms), (C) axial T1-weighted TSE (TR/TE 700/11ms), and (D) T2-weighted TSE […] [...]
Filed Under: Anatomic Regions, Cases, Clinical Imaging, Meet The Experts, soft tissues, Xiaoming Li
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Multiple myeloma

April 14, 2014 by
  Clinical History: 56-year old woman with right leg pain for 10 months   Diagnosis: Multiple myeloma   MR Technique: Imaging of the right lower extremity was performed on a 3T MR system. (A) Coronal T2-weighted TIRM (TR/TE 3000/38ms), (B) sagittal T2-weighted TIRM (TR/TE 3000/38), (C) axial T1-weighted TSE, and (D) axial T2-weighted TSE with […] [...]
Filed Under: Anatomic Regions, bones, Cases, Clinical Imaging, Meet The Experts, Xiaoming Li
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Dermatofibrosarcoma protuberans

April 14, 2014 by
  Clinical history: 50-year old man with progressively enlarging left upper arm mass for one year   Diagnosis: Dermatofibrosarcoma protuberans   Imaging techniques: Imaging of the left upper arm was performed on a 3T MR system (Skyra, Siemens). (A) Coronal T2-weighted TIRM (TR/TE 2734/38), (B) axial T1-weighted TSE (TR/TE 500/12ms), and (C) axial T2-weighted TSE […] [...]
Filed Under: Anatomic Regions, Cases, Clinical Imaging, Meet The Experts, soft tissues, Xiaoming Li
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Intramuscular hemangioma

April 14, 2014 by
  Clinical History: 2-year old boy with an asymptomatic mass in his left buttock Diagnosis: Intramuscular hemangioma MR Technique: Imaging of the pelvis was performed on a 3T MR system (Skyra, Siemens). (A) Coronal T2-weighted TIRM (TR/TE 4000/78ms), (B) axial T1-weighted TSE (TR/TE 450/18ms), (C) axial FS T2-weighted TSE (TR/TE 2500/84ms), and (D) T2-weighted TIRM […] [...]
Filed Under: Anatomic Regions, Cases, Clinical Imaging, Meet The Experts, soft tissues, Xiaoming Li
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Thoracic spine schwannoma

December 17, 2013 by
  Clinical History: 28-year old woman with chest and upper back pain for 3 months Diagnosis: Thoracic spine schwannoma  MR Technique: Imaging of the thoracic spine was performed on a 3T MR system. (A) Sagittal T1-weighted TSE (TR/TE 650/8.1ms), (B) sagittal T2-weighted TSE (TR/TE 2000/97), (C) sagittal T2-weighted TSE images with Dixon fat suppression (TR/TE2500/101), […] [...]
Filed Under: Anatomic Regions, Cases, Clinical Imaging, Meet The Experts, spine, thoracic, Val M. Runge
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Right thigh rhabdomyosarcoma

December 17, 2013 by
  Clinical history: 44-year old man with progressively enlarging right thigh mass Diagnosis: Rhabdomyosarcoma Imaging techniques: Imaging of the right thigh was performed on a 3T MR system (Skyra, Siemens). (A) Coronal T2-weighted TIRM (TR/TE 3000/38), (B) sagittal T2-weighted TIRM (TR/TE 3000/38ms), (C) axial T1-weighted TSE (TR/TE 700/12ms), and (D) T2-weighted TSE images with Dixon […] [...]
Filed Under: Anatomic Regions, Cases, Clinical Imaging, Meet The Experts, soft tissues, Xiaoming Li
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Oligodendroglioma

December 17, 2013 by
    Clinical history: 51-year old woman with episodic seizures for 20 years Diagnosis: Oligodendroglioma (WHO grade II) Imaging techniques: (A) Sagittal T1-weighted TIRM*(TR/TE 2000/9ms), (B) axial T1-weighted TIRM (TR/TE 2000/9ms), (C) axial T2-weighted TSE (TR/TE 4800/99ms), (D) axial T2-weighted TIRM (TR/TE 8500/85ms), and (E) coronal T2-weighted TIRM (TR/TE 8500/85ms) images were acquired along with […] [...]
Filed Under: Anatomic Regions, brain, Cases, Clinical Imaging, Meet The Experts, Val M. Runge
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Giant cell tumor

November 14, 2013 by
  Clinical History: 40 year old man with left knee pain for three months Diagnosis: Giant cell tumor involving the proximal tibia with intratumoral hemorrhage MR Technique: Knee imaging was performed on a 3T MR system (Skyra, Siemens). (A) Axial T1-weighted TSE (TR/TE 700/12ms) images and (B) axial T2-weighted TSE images with Dixon fat suppression […] [...]
Filed Under: Anatomic Regions, Cases, Clinical Imaging, knee, Meet The Experts, the joints, Xiaoming Li
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Eosinophilic granuloma

November 14, 2013 by
Clinical History: 12 year old boy with back pain limiting activities of daily living Diagnosis: Thoracic vertebral eosinophilic granuloma MR Technique: Thoracic spine imaging was performed on a 3T MR system (Skyra, Siemens). (A) Sagittal T1-weighted TSE (TR/TE 650/8.1ms) and (B) T2-weighted TSE (TR/TE 2000/97ms) images were acquired. Contrast-enhanced sagittal T1-weighted (C) and coronal T1-weighted […] [...]
Filed Under: Anatomic Regions, Cases, Clinical Imaging, Meet The Experts, spine, thoracic, Xiaoming Li
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ADVANCED CLINICAL BRAIN IMAGING AT 3 T

July 5, 2013 by
SNR and Parallel Imaging Improvements Offered by a 32 Channel Head Coil Design Advanced head coil design with 3 T imaging substantially improves the available signal-to-noise ratio (SNR), making possible a significant reduction in scan time, the use of advanced parallel imaging, high spatial resolution imaging (reduced voxel size in 3D acquisitions, whether for imaging of the brain itself or the vasculature) and implementation of innovative imaging techniques. The use of higher parallel imaging factors in conventional diffusion-weighted echoplanar imaging (EPI), together with the implementation of a fast spin echo (FSE) based BLADE diffusion-weighted scan is illustrated in patients with acute infarction (the latter free of bulk susceptibility artifact and geometric image distortion). [...]
Filed Under: brain, Clinical Imaging, Software & Hardware Updates
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