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Computed Tomography

Computed Tomography

Tomography refers to imaging by sections. Computed tomography (CT) is a non-invasive imaging technique that uses computers to analyze several cross-sectional X-rays to reveal minute details about structures in the body.
The technique was invented in the 1970s and is based on the principle that as X-rays pass through the body, they are absorbed or reflected at different levels. In the technique, a patient lies on a motorized platform while a computerized axial tomography (CAT) scanner rotates...

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Three-dimensional computed tomography for planning donor hepatectomy.

S Satou¹, Y Sugawara, S Tamura

¹Artificial Organ and Transplantation Division, Department of Surgery, University of Tokyo, Tokyo, Japan.

Transplantation Proceedings

|February 6, 2007

Summary

Accurate preoperative liver volume estimation using 3-D CT is crucial for living donor liver transplantation. The region-growing method effectively aids graft selection and surgical planning for liver grafts.

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Area of Science:

Hepatology
Surgical Planning
Medical Imaging

Background:

Accurate preoperative volumetric assessment of donor livers is critical for successful living donor liver transplantation (LDLT).
Precise graft sizing ensures optimal outcomes and minimizes complications in recipients.

Purpose of the Study:

To evaluate the utility of three-dimensional (3-D) computed tomography (CT) with a region-growing method for volumetric analysis of donor livers in LDLT.
To assess the correlation between estimated and actual graft volumes.

Main Methods:

Three-dimensional (3-D) computed tomography (CT) was performed on 56 living liver donors.
Liver sector volumes were measured using a region-growing method to construct 3-D images.
The volume of specific sectors, including the right paramedian sector, was quantified.

Main Results:

Median volume distribution: left liver (34%), caudate lobe (4%), right paramedian sector (38%), and lateral sector (25%).
3-D CT accurately depicted the congestive area in the right paramedian sector, representing 32% of the right liver volume.
A strong correlation (r = .86) was observed between estimated and actual graft volumes.

Conclusions:

The region-growing method applied to 3-D CT is a valuable tool for graft selection in LDLT.
This technique aids in determining the necessity of middle hepatic vein reconstruction for right liver grafts.