Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
SONOGRAPHY OF ACUTE CHOLECYSTITIS - COMPARISON OF COLOR AND POWER DOPPLER SONOGRAPHY IN DETECTING A HYPERVASCULARIZED GALLBLADDER WALL
Autore:
UGGOWITZER M; KUGLER C; SCHRAMAYER G; KAMMERHUBER F; GROLL R; HAUSEGGER KA; RATSCHEK M; QUEHENBERGER F;
Indirizzi:
GRAZ UNIV,DEPT RADIOL,AUENBRUGGERPL 9 A-8036 GRAZ AUSTRIA GRAZ UNIV,DEPT SURG A-8036 GRAZ AUSTRIA GRAZ UNIV,INST PATHOL A-8036 GRAZ AUSTRIA GRAZ UNIV,INST MED INFORMAT & STAT A-8036 GRAZ AUSTRIA
Titolo Testata:
American journal of roentgenology
fascicolo: 3, volume: 168, anno: 1997,
pagine: 707 - 712
SICI:
0361-803X(1997)168:3<707:SOAC-C>2.0.ZU;2-Y
Fonte:
ISI
Lingua:
ENG
Soggetto:
CYSTIC ARTERY; FLOW;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
19
Recensione:
Indirizzi per estratti:
Citazione:
M. Uggowitzer et al., "SONOGRAPHY OF ACUTE CHOLECYSTITIS - COMPARISON OF COLOR AND POWER DOPPLER SONOGRAPHY IN DETECTING A HYPERVASCULARIZED GALLBLADDER WALL", American journal of roentgenology, 168(3), 1997, pp. 707-712

Abstract

OBJECTIVE. We evaluated the sensitivity and specificity of power Doppler sonography compared with conventional color Doppler sonography andgray-scale sonography in diagnosing patients with acute cholecystitis. SUBJECTS AND METHODS. Seventy-six patients with right upper quadrantpain and 72 healthy volunteers underwent gray-scale sonography, conventional color Doppler sonography, and power Doppler sonography of the gallbladder. The vascularity of the gallbladder wall was scored on a scale of 0 to +++, Histology revealed acute cholecystitis in 55 patients. Histologic specimens and clinical workups showed that the remaining21 patients suffered from other diseases. RESULTS. Sensitive sonographic features such as the positive Murphy's sign (in 96% of patients with acute cholecystitis), calculi (95%), and a thickened gallbladder wall (73%) lacked specificity (71%, 38%, 67%, respectively) for diagnosing acute cholecystitis. In our study, the sensitivity of power Dopplersonography was 95%, compared with 33% for color Doppler sonography inrevealing a hypervascularized gallbladder wall, Power Doppler sonography revealed hyperemia within a nonthickened gallbladder wall in four patients with surgically proven acute cholecystitis. Specificity of power Doppler sonography was 86% compared with 95% for conventional color Doppler sonography. False-positive results with power Doppler sonography were caused by pancreatitis, duodenal ulcer, and gallbladder carcinoma. Interobserver variability seemed to play no significant role. No intramural hypervascularity was detected in the volunteer group. In four (4%) of 89 symptomatic patients we could not use power Doppler sonography because of the patients' noncompliance. Mean values of the resistive index assessed within intramural vessels of the gallbladder showed no significant differences (p <.001) between patients with acute cholecystitis (0.73) and patients with other diseases (0.71). CONCLUSION. Although the sensitivity of power Doppler sonography in diagnosingacute cholecystitis was similar to that of gray-scale sonography, thespecificity of power Doppler sonography was significantly higher, which may substantially improve diagnostic confidence, However, the high susceptibility of power Doppler sonography to motion artifacts makes appropriate adjustment of technical parameters much more relevant than with other sonographic imaging. The resistive index within intramural vessels has no clinical use in the diagnosis of acute cholecystitis.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 01/12/20 alle ore 15:36:48