Natsuki Tajima

Primary leiomyoma of the ovary: a case report

Abstract. The imaging features of primary ovarian leiomyoma have seldom been described because of the very low prevalence of the tumor. Herein we present a case report on its magnetic resonance imaging features. Both T1- and T2-weighted images revealed a low-signal-intensity mass, which was well circumscribed and sharply demarcated from the uterus. Magnetic resonance imaging was useful in distinguishing it from a malignant ovarian tumor and uterine leiomyoma.

Effect of iohexol and diatrizoate on pulmonary arterial pressure following pulmonary angiography. A clinical comparison in man.

A clinical comparison of the effects on pulmonary arterial pressure produced by iohexol and diatrizoate, following selective pulmonary angiography, was made in 17 patients with a normal pressure before the injection of the contrast medium. A double blind crossover study was performed and each contrast medium was administered in random order. The pulmonary arterial pressure was continuously recorded before, during and after the injection for 3 minutes. The effect of iohexol on the pulmonary arterial pressure was significantly less than that of diatrizoate. The results indicated that iohexol should be better tolerated than diatrizoate and therefore a safer contrast medium for selective pulmonary angiography.

Aberrant Right Gastric Vein Draining Directly into the Quadrate Lobe of the Liver A Case Report

Angiography and arterial angio-CT in a 21-year-old man with idiopathic portal hypertension revealed an aberrant right gastric vein communicating directly with the quadrate lobe of the liver. This is the first report of a radiologically confirmed case of an aberrant right gastric vein with a unique area of distribution in the liver parenchyma.

Effect of an iso-osmolar contrast medium on pulmonary arterial pressure at pulmonary angiography

A clinical comparison of the effects on pulmonary arterial pressure induced by contrast media with various osmolalities, iohexol 140 mg I/ml (300 mosm/kg H2O), iohexol 300 mg I/ml (690 mosm/kg H2O), and diatrizoate 292 mg I/ml (1480 mosm/kg H2O) following selective pulmonary angiography was made in 12 patients with normal pulmonary arterial pressure. A double-blind crossover study was performed and the contrast media were administered in random order. The pulmonary arterial pressure was recorded continuously before, during, and for 3 min after the injection. The effect of iohexol 140 on the pulmonary arterial pressure was significantly less marked than that of diatrizoate 292, whereas no statistical significance was shown between iohexol 140 and iohexol 300. These results indicate that iso-osmolar contrast medium (iohexol 140), as well as iohexol 300, would be better tolerated than diatrizoate 292, and is therefore a safer contrast medium for selective pulmonary angiography.

Arteriovenous malformation of the gallbladder

Abstract. Review of the literature shows no reports of vascular malformation of the gallbladder. Herein we report an unusual case of arteriovenous malformation of the gallbladder in a patient with hepatocellular carcinoma. The gallbladder lesion was found incidentally during abdominal angiography for the carcinoma. The angiographic features were specific, comprising dilated and tortuous feeding cystic arteries, a racemose vascular network, and early-filling cystic veins.

Aberrant Right Gastric Vein Draining Directly into the Quadrate Lobe of the Liver

Angiography and arterial angio-CT in a 21-year-old man with idiopathic portal hypertension revealed an aberrant right gastric vein communicating directly with the quadrate lobe of the liver. This is the first report of a radiologically confirmed case of an aberrant right gastric vein with a unique area of distribution in the liver parenchyma.