J Korean Radiol Soc.  1995 Oct;33(4):559-564.

Quantitative Spiral CT: Clinical Usefulness in Prediction of Postoperative Lung Function in Patients with Pulmonary Resection

• Im JG
• Goo JM
• Yeon KM
• Jo IC
• Chung MJ

Abstract

PURPOSE
We evaluated the usefulness of quantitative spiral CT to predict postoperative lung function in patients undergoing pulmonary resection.
MATERIALS AND METHODS
Fourteen patients in whom pneumonectomy or segmentectomy were performed underwent preoperative chest spiral CT and pulmonary function test(PFT). Six patients underwent postoperative follow-up PFT. Ten patients underwent preoperative radioisotope(RI) lung perfusion scan. Preoperative CT data were postprocessed with contiguous pixel method ranged from -9107HU to -500HU to quantify total functional lung volume(TFLV) and regional volume to be resected(RFLV). Postoperative lung function was predicted by following formula;Predicted postoperative PFT value=preoperative PFT x 1-RFLV/TFLV). CT predicted value was compared with postoperative measured PFT value and those value of RI perfusion scan.
RESULTS
CT predicted values were very close to postoperative measured value and RI predicted value, and were correlated well with postoperative measured values (FVC: r=0.988, P<0.001 ;FEV1: r=0.994, P<0.001) and RI predicted values (FVC :r=0.976, P<0.001 ;FEVl: r=0.974, p<0.001).
CONCLUSION
Quantitative spiral CT was useful to predict postoperative lung function and could be an effective alternative to RI perfusion scan.

MeSH Terms

Follow-Up Studies
Humans
Lung*
Mastectomy, Segmental
Perfusion
Pneumonectomy
Thorax
Tomography, Spiral Computed*