CAIPIRINHA – Revisited

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. [...]

Accelerated Diffusion Tensor Imaging of Skeletal Muscle Using Simultaneous Multi-Slice Acquisition

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. [...]

Simultaneous Multi-Slice (SMS) Imaging for Pre-Surgical BOLD fMRI and Diffusion Tractography: Case Illustrations

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. [...]

Quiescent Interval Single-Shot (QISS) Lower Extremity MRA for the Diagnosis of Peripheral Artery Disease: Case Presentations

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. [...]

Point-of-Care MR Imaging and How We can Learn from Other Imaging Modalities. Thoughts on a Potential New Strategy

The article introduces point-of-care MRI, an extremely focused and goal-directed examinations strategy, that could reduce examination time and patient comfort. [...]

Simultaneous Multi-Slice (Slice Accelerated) Diffusion EPI: Early Experience for Brain Ischemia and Cervical Lymphadenopathy

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. [...]

Clinical Case: 3 Tesla MR Neurography-Guided Posterior Femoral Cutaneous Nerve Block

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 [...]

Pelvic schwannoma

  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 […] [...]

Brain abscess

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 […] [...]

Proliferative myositis

  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 […] [...]

Right renal angiomyolipoma

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 […] [...]

Left thigh schwannoma

  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 […] [...]

Chronic osteomyelitis of the left femur

  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 […] [...]

Prostatic sarcoma

        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 […] [...]

Cystosarcoma phyllodes of the breast (CSPB)

    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), […] [...]

Left thigh myxofibrosarcoma

  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 […] [...]

Multiple myeloma

  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 […] [...]

Dermatofibrosarcoma protuberans

  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 […] [...]

Intramuscular hemangioma

  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 […] [...]

Thoracic spine schwannoma

  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), […] [...]

Right thigh rhabdomyosarcoma

  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 […] [...]

Oligodendroglioma

    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 […] [...]

Giant cell tumor

  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 […] [...]

Eosinophilic granuloma

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 […] [...]

ADVANCED CLINICAL BRAIN IMAGING AT 3 T

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). [...]