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B W Carson

Publications and source records attributed to B W Carson.

6 recordsLinked to original sources
PubMed2001

Oblique sagittal view of the anterior cruciate ligament: comparison of coronal vs. axial planes as localizing sequences.

The purpose of this study was to determine whether oblique sagittal T2-weighted images of the anterior cruciate ligament (ACL) are better prescribed off axial or coronal localizing images. Thirty-one patients underwent two sets of oblique sagittal T2-weighted fast spin-echo sequences to evaluate the ACL. One oblique was prescribed from a coronal localizing sequence, while the other was prescribed off an axial series. Objective (average number of images to demonstrate ACL) and subjective (radiologist's confidence level) evaluations of both sequences were performed independently of the other and then comparatively by two radiologists. The coronally prescribed sagittal oblique was subjectively preferred in 18 patients, the axially prescribed oblique was preferred in one patient, and both sequences were felt to be equivalent in 12 patients. In 13 intact ligaments, the average number of images clearly demonstrating the entire length of the ACL was 1.77 on the coronally prescribed sequence and 1.31 on the axially prescribed images. Oblique sagittal images prescribed off a coronal localizer are both subjectively and objectively more effective than axially prescribed sagittal obliques in evaluating the ACL.

Adolescent↗
PubMed2000

Low grade gastric MALT Lymphoma: radiographic findings.

AIMS: Gastric MALT (mucosa-associated lymphoid tissue) lymphoma is now recognized as a distinct entity within extranodal non-Hodgkin's lymphoma. The purpose of this study was to describe the radiographic findings in low grade gastric MALT lymphoma. MATERIALS AND METHODS: We retrospectively reviewed the radiographic findings in 22 cases of low-grade gastric MALT lymphoma. The study group consisted of 15 men and seven women (median age 68 years, range 41-91 years). Lesions were designated as infiltrative or polypoid by consensus of two radiologists. Polypoid lesions were categorized by number and size. Anatomical site within the stomach and presence of transpyloric or oesophagogastric extension was determined for each case. The presence of abdominal lymphadenopathy was categorized as regional or distant. The presence of Helicobacter pylori was determined from endoscopic and surgical biopsies. RESULTS: Computed tomography (CT) revealed abnormalities of the stomach in 19 cases of the 21 in which it was performed. There were 14 infiltrative lesions and five polypoid lesions. Of the 14 infiltrative lesions, the mean gastric wall thickness was 2.2 cm (range 0.8-6.0 cm). There were three single and two multiple polypoid lesions (mean size 2.2 cm, range 1. 5-2.7 cm). Transpyloric extension was observed in two cases and oesophagogastric extension in one. Abdominal lymphadenopathy was observed in 10 of 21 patients. Helicobacter pylori was found in 19 of 22 cases (86%). CONCLUSION: Low grade B cell gastric MALT lymphomas present with an infiltrative form on CT in about three-quarters of cases and a polypoid pattern in the remainder. Abdominal lymphadenopathy is seen in approximately one-half of cases. There is a high association with Helicobacter pylori.

Adult↗
PubMed1998

Ultrasonographically guided percutaneous biopsy of gastric, small bowel, and colonic abnormalities: efficacy and safety.

The purposes of this study were to evaluate the efficacy of sonographically guided percutaneous biopsy of gastric and bowel lesions and to document any associated complications. A retrospective review of all patients undergoing ultrasonographically guided biopsy of gastric, small bowel, or colonic lesions was performed. Cases were evaluated for size of lesion, location, efficacy in obtaining a diagnostic specimen, and any procedure-related complications. A total of 46 biopsies were performed in 44 patients over a 6 year period. Fifteen gastric, four duodenal, seven small bowel, 16 right colonic, and two left colonic lesions were identified. Histologic diagnosis included 20 adenocarcinomas, seven lymphomas, 10 mesenchymal tumors, and two cases of candidal enteritis. In 18 (41%) patients the initial fine-needle aspirate was negative, although 10 of these patients subsequently underwent ultrasonographically guided core biopsy with a diagnosis of neoplasm established in all 10. Two patients with an initial negative result on fine-needle aspiration underwent repeat aspiration, demonstrating malignancy. Two additional false-negative aspirates were obtained; these patients did not undergo repeat biopsy but were subsequently found to have lymphoma. Two of the patients with aspirates that were negative for malignancy were believed to have inflammatory changes secondary to pancreatitis. One patient was lost to follow-up evaluation. No complications were recorded. Percutaneous fine-needle aspiration of gastric and bowel lesions is a simple and safe procedure and may be particularly useful with poor candidates for endoscopy or for lesions that are difficult or impossible to reach endoscopically. Diagnostic yield is high, particularly in documenting malignancy, although in suspected stromal tumors a core biopsy often is required.

Adenocarcinoma↗