PET/MRI: pictorial review of hepatobiliary and pancreatic applications.

PET and MRI both play valuable roles in the management of hepatobiliary and pancreatic (HBP) malignancies. Simultaneous PET/MRI combines the excellent soft-tissue resolution and anatomic details from MRI with functional information from PET in a single comprehensive examination. MRI is the main imaging modality in evaluating HCC, playing important roles in screening, characterization, local extent, and evaluating tumor response, whereas F-fluorodeoxyglucose (FDG) PET can help evaluate for lymph node involvement and metastatic disease.

Neurologic pathologies of the vertebral spine.

At some institutions, musculoskeletal and general radiologists rather than neuroradiologists are responsible for reading magnetic resonance imaging (MRI) of the spine. However, neurological findings, especially intrathecal ones, can be challenging. Intrathecal neurological findings in the spine can be classified by location (epidural, intradural extramedullary, and intramedullary) or etiology (tumor, infection, inflammatory, congenital).

MRI Findings of Arachnoiditis, Revisited. Is Classification Possible?

Background: Prior imaging studies characterizing lumbar arachnoiditis have been based on small sample numbers and have reported inconsistent results.

Purpose: To review the different imaging patterns of lumbosacral arachnoiditis, their significance, and clinical implications.

Study Type: Retrospective.

MR Perfusion and MR Spectroscopy of Brain Neoplasms.

Advances in imaging techniques, such as MR perfusion and spectroscopy, are increasingly indispensable in the management and treatment plans of brain neoplasms: from diagnosing, molecular/genetic typing and grading neoplasms, augmenting biopsy results and improving accuracy, to ultimately directing and monitoring treatment and response. New developments in treatment methods have resulted in new diagnostic challenges for conventional MR imaging, such as pseudoprogression, where MR perfusion has the widest current application. MR spectroscopy is showing increasing promise in noninvasively determining genetic subtypes and, potentially, susceptibility to molecular targeted therapies.

Thyroid Cancer Bone Metastasis: Survival and Genomic Characteristics of a Large Tertiary Care Cohort.

Unlabelled: Bone metastasis (BM) in differentiated thyroid cancer (DTC) is the second most common site of metastasis after lung. Bone metastases are associated with worse prognosis in DTC. In this study, we examined risk factors for overall survival in patients with BM and for the first time explore the pattern of genomic alterations in DTC BM.

New era of PET/CT in breast cancer: high-resolution PET/dfCT.

Objective: To determine whether breast cancer staging differs between high-resolution (HR) and standard-resolution (SR) PET/computed tomography acquisition.

Patients And Methods: This retrospective study included 39 women with breast cancer referred for staging. Images were assessed for the number of primary breast lesions with the corresponding size and the average maximum standardized uptake value (SUVmax), the anatomical site of fluorine-18-fluorodeoxyglucose-avid lymph nodes (LNs) with their SUVmax, and the number and type (lytic/blastic) of metastatic bone lesions.

C-Choline Pharmacokinetics in Recurrent Prostate Cancer.

The aim of this study was to investigate the value of pharmacokinetic modeling for quantifying C-choline uptake in patients with recurrent prostate cancer. In total, 194 patients with clinically suspected recurrence of prostate cancer underwent C-choline dynamic PET over the pelvic region (0-8 min), followed by a 6-min static acquisition at about 25 min after injection. Regions of interest were drawn over sites of disease identified by a radiologist with experience in nuclear medicine.