Comparative Analysis of Lung Perfusion Scan and SPECT/CT for the Evaluation of Functional Lung Capacity
10.1007/s13139-019-00617-7
- Author:
Hoon Young SUH
1
;
Sohyun PARK
;
Hyun Gee RYOO
;
Ji Young KIM
;
Tae Sung KIM
;
Jong Mog LEE
;
Moon Soo KIM
;
Hee Chul YANG
;
Seok Ki KIM
Author Information
1. Department of Nuclear Medicine, National Cancer Center, Goyang, Republic of Korea. skkim@ncc.re.kr
- Publication Type:Original Article
- From:Nuclear Medicine and Molecular Imaging
2019;53(6):406-413
- CountryRepublic of Korea
- Language:English
-
Abstract:
PURPOSE:This study aimed to compare lung perfusion scan with single photon emission computed tomography/computed tomography (SPECT/CT) for the evaluation of lung function and to elucidate the most appropriate modality for the prediction of postoperative lung function in patients with lung cancer.
METHODS:A total of 181 patients underwent Tc-99m macroaggregated albumin lung perfusion scan and SPECT/CT to examine the ratio of diseased lung and diseased lobe. Forty-one patients with lung cancer underwent both preoperative and postoperative pulmonary function tests within 1 month to predict postoperative pulmonary function. Predicted postoperative forced expiratory volume in 1 s (ppoFEVâ‚) was calculated by the % radioactivity of lung perfusion scan and SPECT, and the % volume of the residual lung, assessed on CT.
RESULTS:The ratios of diseased lung as seen on lung perfusion scan and SPECT showed significant correlation, but neither modality correlated with CT. The ratios of the diseased lung and diseased lobe based on CT were higher than the ratios based on either perfusion scan or SPECT, because CT overestimated the function of the diseased area. The lobar ratio of both upper lobes was lower based on the perfusion scan than on SPECT but was higher for both lower lobes. Actual postoperative FEVâ‚ showed significant correlation with ppoFEVâ‚ based on lung perfusion SPECT and perfusion scan.
CONCLUSIONS:We suggest SPECT/CT as the primary modality of choice for the assessment of the ratio of diseased lung area. Both perfusion scan and SPECT/CT can be used for the prediction of postoperative lung function.
