Preoperatively and 6 months postoperatively, BMI was calculated as weight/height2 (kg/m2). Whole body fat (grams), lean mass (grams) and areal BMD (aBMD, g/cm2) were measured by DXA (Hologic Discovery W and Horizon A densitometers, Bedford, MA, USA). Each participant had her preoperative and postoperative imaging on the same machine. Modified half-body scans were utilized if a participant’s body dimensions exceeded the scanning area width.(36 (link)) Vertebral volumetric BMD (vBMD, g/cm3) at the L3 and L4 vertebrae was measured by QCT (GE VCT64 scanner; General Electric, Milwaukee, WI, USA). Findings on QCT were evaluated according to methods described previously (Mindways Software, Austin, TX, USA).(37 (link), 38 (link)) We measured visceral adipose tissue area (cm2) using a single axial slice at the mid-L4 vertebrae by CT. Fascial borders of the internal abdominal wall were traced manually using a previously described approach.(39 (link))
Ge vct64 scanner
Manufactured by GE Healthcare
Sourced in United States
The GE VCT64 scanner is a computed tomography (CT) imaging system that features 64-slice technology. It is capable of capturing high-resolution images of the body's internal structures. The VCT64 scanner is designed to provide healthcare professionals with detailed diagnostic information to support clinical decision-making.
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Lab products found in correlation
2 protocols using ge vct64 scanner
1
Preoperative and Postoperative Body Composition Assessment
2
Bone Density Changes After Gastric Bypass
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We measured BMD at baseline and 6 months after gastric bypass surgery. Areal BMD (g/cm2) was assessed by dual-energy x-ray absorptiometry (DXA; Hologic Discovery W and Horizon A densitometers; Bedford, MA, USA). Paired baseline and postoperative scans were performed on the same machine. We assessed volumetric BMD (g/cm3) at the L3 and L4 vertebrae by quantitative computed tomography (QCT; GE VCT64 scanner; General Electric, Milwaukee, WI, USA), which was then analyzed using previously published methods (Mindways Software; Austin, TX, USA) (Lang et al., 1999 (link); Khoo et al., 2009 (link)). Volumetric BMD at the tibia was measured by high-resolution peripheral quantitative computed tomography (HR-pQCT; XtremeCT, Scanco Medical, Brüttisellen, Switzerland), using the manufacturer's standard in vivo protocol. The ankle on the side of the nondominant forearm was scanned, with fixed scanned regions starting at 22.5 mm proximal to the mid joint line and extending proximally for 9.02 mm (110 slices). HR-pQCT images were analyzed using the manufacturer's standard clinical evaluation protocol in Imaging Processing Language (IPL v5.08b, Scanco Medical) (Boutroy et al., 2008 (link); Khosla et al., 2006 (link); Laib et al., 1998 (link)).
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