Journal of Nippon Medical School: Vol.67 No.1 page.024

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ArticleTitle 4D-CT: A new development in three-dimensional hepatic computed tomography

AuthorList Taro Ichikawa¹ and Tatsuo Kumazaki²

Affiliation ¹Department of Radiology, Tama Nagayama Hospital, Nippon Medical School²Department of Radiology, Nippon Medical School

Language EN

Volume 67

Issue 1

Year 2000

Page 24-27

Received November 10, 1999

Accepted November 29, 1999

Keywords image processing, computer-assisted tomography, X-ray, computed, liver neoplasms, 4D-CT

Abstract 1. Objective: Addition of contrast dynamics to three-dimensional hepatic tumor CT imaging. 2. Materials and Methods: Six patients with hepatic cavernous hemangioma with a mean age of 57 years were included in the study. Two of the patients were male and four were female. Contrast enhanced computed tomography (CT) was carried out on the tumors in six phases by helical CT, using bolus injection of contrast medium intravenously. Using maximum intensity projection (MIP), a separate three-dimensional image was then reconstructed for each phase, and rotational images around the longitudinal axis of the torso were observed using the CRT monitor. 3. Results: The patterns of contrast enhancement of hepatic cavernous hemangiomas were obtained on 3D-images. In all patients, the reciprocal relations between the tumor and the portal veins and the hepatic veins were clearly imaged three-dimensionally. 4. Conclusions: We have succeeded in adding the dynamic observation of a contrast medium to static three-dimensional imaging. This will be valuable for the diagnosis of hepatic tumors, and it opens up new prospects for diagnostic imaging.

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ArticleTitle	4D-CT: A new development in three-dimensional hepatic computed tomography
AuthorList	Taro Ichikawa¹ and Tatsuo Kumazaki²
Affiliation	¹Department of Radiology, Tama Nagayama Hospital, Nippon Medical School²Department of Radiology, Nippon Medical School
Language	EN
Volume	67
Issue	1
Year	2000
Page	24-27
Received	November 10, 1999
Accepted	November 29, 1999
Keywords	image processing, computer-assisted tomography, X-ray, computed, liver neoplasms, 4D-CT
Abstract	1. Objective: Addition of contrast dynamics to three-dimensional hepatic tumor CT imaging. 2. Materials and Methods: Six patients with hepatic cavernous hemangioma with a mean age of 57 years were included in the study. Two of the patients were male and four were female. Contrast enhanced computed tomography (CT) was carried out on the tumors in six phases by helical CT, using bolus injection of contrast medium intravenously. Using maximum intensity projection (MIP), a separate three-dimensional image was then reconstructed for each phase, and rotational images around the longitudinal axis of the torso were observed using the CRT monitor. 3. Results: The patterns of contrast enhancement of hepatic cavernous hemangiomas were obtained on 3D-images. In all patients, the reciprocal relations between the tumor and the portal veins and the hepatic veins were clearly imaged three-dimensionally. 4. Conclusions: We have succeeded in adding the dynamic observation of a contrast medium to static three-dimensional imaging. This will be valuable for the diagnosis of hepatic tumors, and it opens up new prospects for diagnostic imaging.
Correspondence to