title: Predicting exercise capacity after lobectomy by single photon emission computed tomography and computed tomography.
abstract: OBJECTIVE
  This study compared the prediction of postoperative exercise capacity by employing lung perfusion scintigraphy images obtained with single photon emission computed tomography together with computed tomography (SPECT/CT) versus the common method of counting subsegments (SC method).
  
  
  METHODS
  In 18 patients scheduled for lobectomy, predicted postoperative maximum oxygen uptake per kilogram body weight ([Formula: see text]) was calculated by the SPECT/CT and SC methods. Correlations were examined between the [Formula: see text] predicted by SPECT/CT or the SC method, and the actual [Formula: see text] measured at 2 weeks (mean 15.4 ± 1.5 days) and 1 month (mean 29.1 ± 0.75 days) after surgery to determine whether SPECT/CT was more accurate than SC for predicting postoperative exercise capacity.
  
  
  RESULTS
  There was a significant positive correlation between the [Formula: see text] predicted by SPECT/CT and the actual value at 2 weeks (r = 0.802, p < 0.0001) or 1 month (r = 0.770, p < 0.0001). There was also a significant positive correlation between the [Formula: see text] predicted by SC and the actual value at 2 weeks (r = 0.785, p < 0.0001) or 1 month (r = 0.784, p < 0.0001).
  
  
  CONCLUSIONS
  This study showed that both SPECT/CT and the SC method were useful for predicting postoperative [Formula: see text] in the clinical setting.
authors.affiliation: Department of Thoracic Surgery, Omuta City Hospital, 2-19-1 Takarazaka-machi, Ohmuta, 836-8567, Japan. nagam2@nifty.com.
authors.forename: Yoshinori
authors.initials: Y
authors.lastname: Nagamatsu
authors.affiliation: Department of Surgery, Omuta City Hospital, Ohmuta, Fukuoka, Japan.
authors.forename: Susumu
authors.initials: S
authors.lastname: Sueyoshi
authors.affiliation: Department of Surgery, Omuta City Hospital, Ohmuta, Fukuoka, Japan.
authors.forename: Hiroko
authors.initials: H
authors.lastname: Sasahara
authors.affiliation: Department of Surgery, Omuta City Hospital, Ohmuta, Fukuoka, Japan.
authors.forename: Yousuke
authors.initials: Y
authors.lastname: Oka
authors.affiliation: Department of Radiology, National Hospital Organization, Omuta National Hospital, Ohmuta, Fukuoka, Japan.
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Kumazoe
authors.affiliation: Department of Surgery, School of Medicine, Kurume University, Kurume, Fukuoka, Japan.
authors.forename: Masahiro
authors.initials: M
authors.lastname: Mitsuoka
authors.affiliation: Department of Surgery, School of Medicine, Kurume University, Kurume, Fukuoka, Japan.
authors.forename: Yoshito
authors.initials: Y
authors.lastname: Akagi
mesh_terms: D000368:Aged; D017079:Exercise Tolerance / Q000502:physiology*; D005260:Female; D006801:Humans; D008175:Lung Neoplasms / Q000000981:diagnostic imaging / Q000503:physiopathology / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D064847:Multimodal Imaging; D010101:Oxygen Consumption / Q000502:physiology; D055420:Perfusion Imaging / Q000379:methods; D011013:Pneumonectomy / Q000379:methods*; D011182:Postoperative Care; D000072098:Single Photon Emission Computed Tomography Computed Tomography; D015899:Tomography, Emission-Computed, Single-Photon / Q000379:methods; D014057:Tomography, X-Ray Computed / Q000379:methods
keywords: Computed tomography; Exercise capacity; Exercise testing; Lung cancer surgery; SPECT/CT; Single photon emission computed tomography