Somatom sensation 64 ct scanner

This was a retrospective study of patients with acetabular fractures consecutively treated by open reduction internal fixation (ORIF), and all cases were examined at a level I trauma center between February 2015 and April 2018. The inclusion criteria were patients who were older than 18 years, had achieved musculoskeletal system maturity and had a unilateral traumatic acetabular fracture or acute fractures (<21 days). The exclusion criteria were pathological fractures, bilateral acetabular injuries, preexisting ipsilateral hip diseases, or femoral head fracture. The patients were divided into two groups: group A (Associated PW) consisting of 20 patients who presented with acetabular both-column fractures with posterior wall involvement; and group B (Isolated PW), consisting of 20 patients with acetabular isolated posterior wall fractures. All patients were placed in a supine position to undergo preoperative pelvic computed tomography performed using a SOMATOM Sensation 64 CT scanner (Siemens, Erlangen, Germany) at a 1.0 mm slice thickness. The obtained CT scans were assessed in terms of the fracture pattern by two experienced orthopedists according to the Judet and Letournel classification system. Patient demographics and characteristics are shown in Table 1.

All CT scans including non-contrast scan and contrast-enhanced triple phases were performed with the Siemens SOMATOM Sensation 64 CT scanner (Erlangen, Germany) within 7 days before the initial TACE treatment. For standardized analysis of each patient, a cross-sectional enhanced CT images at the third lumbar vertebra (L3) was selected. The areas of skeletal muscle area (SM) and adipose tissue [subcutaneous, (SAT); visceral (VAT)] were measured by using the Slice-O-Matic software (version 5.0; Tomovision, Montreal, Canada), and the calculation was based on the Hounsfield units (HU) thresholds (−29 to 150 HU for SM, −190 to −30 for SAT and −150 to −50 for VAT) (von Hessen et al., 2021 (link)). All of the three variables were normalized for the height in m² and expressed as indexes (cm²/m²). The skeletal muscles at L3 consisted of the psoas major, the erector spinae, the quadratus lumborum, the rectus abdominis, the transversus abdominis, the internal oblique, and the external oblique. Additionally, the density of each variable was calculated in HU. For the measurements of the variables, two observers with more than 5 years of experience in abdominal radiology independently measured the CT images from 30 randomly selected patients and compared the results, and the inter-observer agreement was 97.0%.