Background: Laparoscopic sleeve gastrectomy (LSG) has now a surge in popularity in treatment of morbid obesity patients. Multi-slice computed tomography has an increasing role in management of this patients' group through the availability and efficiency of post processing reconstructive facilities of MSCT software in 3D reconstruction. The purpose of this study is to evaluate MSCT-based volumetric assessment of stomach and gastric sleeves in patients before and after bariatric surgery and correlation between operative gastric volume reduction and body weight reduction.
Methods:  Thirty sleeve gastrectomy-candidate patients received abdominal MSCT immediately after oral administration of an ionic contrast agent solution. The examination was done pre and three months postoperatively. The gastric and sleeve volumes were measured via 3D volume rendering and 3D masks on dedicated workstations.
Results: The correlation between the body weight and gastric volume measured initially in the preoperative state in the studied patients was found to be insignificant. The correlation between body weight reduction percentage and gastric volume reduction percentage in the studied patients was found to be also insignificant.
 
Conclusion: MSCT allows crucial anatomical measurements and provides helpful information about the relation between gastric volume reduction and body weight reduction in sleeve gastrectomy-candidate obese patients.