Academic radiology
-
Controlled Clinical Trial
CT-guided biopsies of pancreatic lesions: impact of contrast application prior to versus following needle placement.
Pancreatic lesions are frequently detected in pancreatic phase only, which may lead to false negative findings in CT-guided biopsies. We evaluated the accuracy and complication rate of CT guided biopsies of pancreatic lesions with i.v.-contrast application following needle placement in comparison to biopsy after contrast enhanced CT. ⋯ CT-guided biopsy of pancreatic lesions with i.v.-contrast application following needle placement is a reliable method and provides superior accuracy compared to biopsies performed after contrast enhanced planning CT.
-
Phosphorous magnetic resonance spectroscopy ((31)P MRS) has been used to evaluate and predict treatment response in squamous cell carcinoma of the head and neck (HNSCC). Several studies have also shown the potential of proton MRS ((1)H MRS) in assessing response in HNSCC. In view of the inherent limitations associated with performing (31)P MRS in clinical settings, the current study was performed to explore whether (1)H MRS could provide similar or complementary metabolic information in HNSCC. ⋯ The biochemical pathways involved in (1)H MRS of tCho may be different from the phospholipid metabolites seen on (31)P MRS of head and neck cancers, and thus the two MRS techniques may be complementary to each other.