Synchronous monitoring of external/internal respiratory motion: validity of respiration-gated radiotherapy for liver tumors.

Purpose: Four-dimensional (4D) radiotherapy, in particular respiration gating for the treatment of lung tumors, is gaining popularity. Its utility for other sites, however, has not been investigated fully. The purpose of this study was to see whether 4D therapy is feasible for liver tumors.

Exhale fluctuation in respiratory-gated radiotherapy of the lung: a pitfall of respiratory gating shown in a synchronized internal/external marker recording study.

Purpose: For optimal respiratory-gated radiotherapy, exhale fluctuation was assessed by monitoring internal fiducials in a synchronized internal/external marker detection system.

Methods: Synchronized internal/external position data were collected during the entire course of treatments for 12 lung patients with 24 fiducials. Baseline was determined in the exhale phase during pre-treatment observation time, and a gating level of external waves was set in each treatment session in a simulation of respiratory-gated radiotherapy.

Serous psammocarcinoma of the ovary: CT and MR findings.

Serous psammocarcinoma, a rare variant of ovarian serous carcinoma, is characterized histologically by the pervasive presence of psammoma bodies. In this case, computed tomography scans showed extensively calcified pelvic and peritoneal masses. The pelvic mass appeared sandy on enhanced T1-weighted magnetic resonance images.

Spontaneous rupture of renal angiomyolipoma: value of multidetector CT angiography for interventional therapy.

Renal angiomyolipomas have a high risk of rupture when they are large and associated with aneurysms. When renal angiomyolipomas rupture, some patients go into shock. Immediate interventional therapies to stop bleeding are required.

Reflux in the left ovarian vein: analysis of MDCT findings in asymptomatic women.

Objective: The aim of this study was to clarify the CT features of ovarian vein reflux in asymptomatic women and to determine the possible cause of the reflux.

Materials And Methods: One hundred ten multiparous or uniparous and 41 nulliparous asymptomatic women were examined on MDCT. Degree, pathway, and associated findings of ovarian vein reflux were evaluated.