Comparability of Echographic and Tomographic Assessments of Body Fat Changes Related to the HIV Associated Adipose Redistribution Syndrome (HARS) in Antiretroviral Treated Patients

Rosario Gulizia, Alessandro Vercelli, Cristina Gervasoni, Alessia Uglietti, Massimiliano Ortu, Giovanna Ferraioli, Massimo Galli, Carlo Filice

Research output: Contribution to journalArticle

Abstract

To assess the comparability of ultrasonographic (US) subcutaneous fat thickness (SFT) measurements in comparison with computed tomography (CT) at reference points (RPs) representative of HIV related adipose redistribution syndrome (HARS) in patients treated with antiretrovirals. US and CT measurements were compared in nine patients with clinical reports of HARS. We obtained the best resolution of facial (at deepest point of Bichat pad), brachial (in the dorsal face of arm) and crural SFT (at mid thigh) by means of minimal transducer pressures avoiding potential biases such as stand off pads pressure on the skin and artefacts due to too abundant quantity of gel. CT scans were obtained in the same RP where US measurements were performed such as identified by means of metallic skin markers. Median US measurement of facial SFT was 8.8 mm (95% CI: 3.1 to 13.4), 3.95 mm (95% CI: 2.62 to 5.84) for brachial SFT and 4 mm (95% CI: 3.4 to 9.4) for crural SFT. Median CT assessments of facial SFT was 8.7 mm (95% CI: 3.5 to 13.5), 4.2 mm (95% CI: 2.6 to 5.88) for brachial SFT and 5 mm (95% CI: 3.9 to 10.3) for crural SFT, with no significant difference at each RP. A linear regression showed good CT/US comparability at each RP, with no significant deviation from linearity (p > 0.10). US shows to be highly comparable with CT, excluding invaliding biases as the transducer pressure on the skin. Given the proven efficacy on the HARS assessments, if well standardized, US could be a reliable method, simpler than CT in the management of body fat changes related to HARS. (E-mail: steinman@imaging.robarts.ca).

Original languageEnglish
Pages (from-to)1043-1048
Number of pages6
JournalUltrasound in Medicine and Biology
Volume34
Issue number7
DOIs
Publication statusPublished - Jul 2008

Fingerprint

human immunodeficiency virus
Subcutaneous Fat
fats
Adipose Tissue
HIV
Tomography
tomography
Arm
Pressure Transducers
Leg
pressure sensors
Skin
thigh
Thigh
Artifacts
Linear Models
markers
linearity
artifacts
regression analysis

Keywords

  • Antiretrovirals
  • Body fat changes
  • HIV infection
  • Lipodystrophy
  • Ultrasonography

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

Cite this

Comparability of Echographic and Tomographic Assessments of Body Fat Changes Related to the HIV Associated Adipose Redistribution Syndrome (HARS) in Antiretroviral Treated Patients. / Gulizia, Rosario; Vercelli, Alessandro; Gervasoni, Cristina; Uglietti, Alessia; Ortu, Massimiliano; Ferraioli, Giovanna; Galli, Massimo; Filice, Carlo.

In: Ultrasound in Medicine and Biology, Vol. 34, No. 7, 07.2008, p. 1043-1048.

Research output: Contribution to journalArticle

Gulizia, Rosario ; Vercelli, Alessandro ; Gervasoni, Cristina ; Uglietti, Alessia ; Ortu, Massimiliano ; Ferraioli, Giovanna ; Galli, Massimo ; Filice, Carlo. / Comparability of Echographic and Tomographic Assessments of Body Fat Changes Related to the HIV Associated Adipose Redistribution Syndrome (HARS) in Antiretroviral Treated Patients. In: Ultrasound in Medicine and Biology. 2008 ; Vol. 34, No. 7. pp. 1043-1048.
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abstract = "To assess the comparability of ultrasonographic (US) subcutaneous fat thickness (SFT) measurements in comparison with computed tomography (CT) at reference points (RPs) representative of HIV related adipose redistribution syndrome (HARS) in patients treated with antiretrovirals. US and CT measurements were compared in nine patients with clinical reports of HARS. We obtained the best resolution of facial (at deepest point of Bichat pad), brachial (in the dorsal face of arm) and crural SFT (at mid thigh) by means of minimal transducer pressures avoiding potential biases such as stand off pads pressure on the skin and artefacts due to too abundant quantity of gel. CT scans were obtained in the same RP where US measurements were performed such as identified by means of metallic skin markers. Median US measurement of facial SFT was 8.8 mm (95{\%} CI: 3.1 to 13.4), 3.95 mm (95{\%} CI: 2.62 to 5.84) for brachial SFT and 4 mm (95{\%} CI: 3.4 to 9.4) for crural SFT. Median CT assessments of facial SFT was 8.7 mm (95{\%} CI: 3.5 to 13.5), 4.2 mm (95{\%} CI: 2.6 to 5.88) for brachial SFT and 5 mm (95{\%} CI: 3.9 to 10.3) for crural SFT, with no significant difference at each RP. A linear regression showed good CT/US comparability at each RP, with no significant deviation from linearity (p > 0.10). US shows to be highly comparable with CT, excluding invaliding biases as the transducer pressure on the skin. Given the proven efficacy on the HARS assessments, if well standardized, US could be a reliable method, simpler than CT in the management of body fat changes related to HARS. (E-mail: steinman@imaging.robarts.ca).",
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