Multiplanar image reconstruction and 3D imaging using a musculoskeletal phantom: conventional versus helical CT.

Purpose: Our goal was to perform a detailed comparison of the relative performances of helical CT (pitches 1.0, 1.5, and 2.

Reconstructed helical CT scans: improvement in z-axis resolution compared with overlapped and nonoverlapped conventional CT scans.

Objective: This in vitro study was designed to assess the z-axis resolving capabilities of reconstructed helical CT scans obtained with various imaging parameters versus those of conventional CT scans and the effect of decreasing slice index on the z-axis resolution of helical CT.

Materials And Methods: A z-axis line-pair phantom was imaged using conventional nonoverlapped CT scans, conventional CT scans that overlapped by 50%, and helical CT scans with pitches of 1.0 and 1.

Patients' attitudes toward informed consent for intravenous contrast media.

Objectives: To assess patient attitudes concerning informed consent and the risks of ionic and nonionic contrast material, 1,197 completed questionnaires were obtained from individuals either awaiting contrast injection or waiting for other services.

Methods: Six different questionnaire formats were administered, including two detailing the specific risks of ionic and nonionic contrast, respectively. Different questionnaire formats were used to assess whether the severity or the probability of adverse consequences had more influence on a patient's desire for information.

MRI in the detection of malignant infiltration of bone marrow.

Magnetic resonance imaging (MRI) at 0.35 T with a superconductive magnet was performed on 80 patients with known or suspected malignant disease of the bone marrow. The group comprised 50 patients with known primary malignancy and 30 with known multiple myeloma.

Magnetic resonance imaging in the diagnosis of breast disease.

Magnetic resonance imaging (MRI) of the breast was performed in 10 volunteers and 102 women with suspected breast disease, using a 0.35-T superconducting magnet. All patients had prior x-ray mammography.

CT appearance of omental packs.

Liver lacerations may be surgically treated by using the omentum as packing. A radiologist can differentiate potential postoperative complications, such as abscess, hematoma, and biloma, from these packs on computed tomographic scans by noting attenuation values.

Ultrasonographic findings in acute acalculous cholecystitis.

Acute acalculous cholecystitis (AAC) is usually seen as a complication of major surgery or trauma. Although this entity is well-known in the surgical literature, little has been written about it in the radiologic literature. A review of patient records from 1975 through 1982 revealed 16 patients with pathologically confirmed AAC on whom at least 1 sonographic study had been performed.

Radiographic signs of acute traumatic rupture of the thoracic aorta.

The initial chest radiographs of 54 trauma patients who were referred for angiography of the thoracic aorta were reviewed. Retrospective evaluation used eight radiographic signs that have been described in possible aortic injury. This review was undertaken to establish the occurrence and validity of these signs in the diagnosis of aortic tear.

Case report: computed tomography findings in spinal arachnoiditis ossificans.

Spinal arachnoiditis ossificans is rarely diagnosed radiologically. We present such a case with its spinal computed tomography findings, the second such case reported in the radiology literature.