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Hepatic volumetry with PhotoShop in personal computer
1Department of Hepatobiliary Surgery, First Hospital, Xi'an Jiaotong University, Xi'an 710061, China. luyi169@sina.com
Hepatobiliary & Pancreatic Diseases International : HBPD INT
|February 19, 2004
Summary
This study introduces a reliable PhotoShop method for measuring liver and tumor volumes using CT scans. This technique offers accurate volumetry for surgical planning, with results comparable to traditional methods.
Area of Science:
- Medical Imaging
- Surgical Planning
- Hepatobiliary Surgery
Background:
- Accurate liver volumetry is crucial for hepatobiliary surgeons.
- Current methods like CT scans and 3D ultrasound have limitations in providing sufficient volumetric data.
- There is a need for an accessible, surgeon-operated method for liver volume measurement.
Purpose of the Study:
- To develop and validate a novel method for measuring liver and tumor volumes using Adobe Photoshop.
- To provide hepatobiliary surgeons with a user-friendly tool for accurate liver volumetry.
Main Methods:
- CT scan films were digitized into JPEG files.
- Adobe Photoshop was used to determine the area of liver or tumor sections by analyzing pixel values.
- Liver volume was calculated by summing the areas of all sections, assuming a 1 cm section thickness.
Main Results:
- The PhotoShop method demonstrated good relativity when compared to a GE Prospeed CT set for 10 hepatic volumes.
- Calculated volumes for three right lobes before lobectomy showed a variation of less than 5% compared to postoperative measurements using a volumenometer.
Conclusions:
- Hepatic volume measurement using PhotoShop is reliable and meets clinical demands.
- This method facilitates the calculation of important parameters like liver resection rate and graft volume.
- A minor disadvantage is the manual transfer of pixel data from PhotoShop to spreadsheet software.