Preliminary diagnostic reference levels for endoscopic retrograde cholangio-pancreatography in Greece. Issue 4 (April 2016)

• Record Type: Journal Article
• Authors: Tsapaki, V.; Delinikolas, P.; Paraskeva, K.D.; Paspatis, I.A.G.; Scotiniotis, H.; Georgopoulos, P.; Voudoukis, E.; Finou, P.; Athanasopoulos, N.; Lydakis, I.; Giannakopoulos, A.; Mathou, N.; Angelogiannakopoulou, N.; Triantopoulou, C.; Karagiannis, J.A.
• Is Part Of: Physica medica. Volume 32:Issue 4(2016)
• Page Start: 607
• Page End: 611
• Publication Date: 2016-04
• Subjects: ERCP -- Patient dose -- Fluoroscopy time -- Diagnostic reference levels; Medical physics -- Periodicals; Biophysics -- Periodicals; Biophysics -- Periodicals; Imagerie médicale -- Périodiques; Radiothérapie -- Périodiques; Rayons X -- Sécurité -- Mesures -- Périodiques; Physique -- Périodiques; Médecine -- Périodiques; 610.153
• DOI: 10.1016/j.ejmp.2016.03.018
• Languages: English
• ISSNs: 1120-1797

Abstract

Highlights: National preliminary DRLs for KAP and Tf, during ERCPs in Greece. Determination of the relation between KAP and Tf. Comparison of the results with past studies. Abstract: The main objective of this study was to determine the preliminary Diagnostic Reference Levels (DRLs) in terms of Kerma Area Product (KAP) and fluoroscopy time (Tf) during Endoscopic Retrograde Cholangio-Pancreatography (ERCP) procedures. Additionally, an investigation was conducted to explore the statistical relation between KAP and Tf. Data from a set of 200 randomly selected patients treated in 4 large hospitals in Greece (50 patients per hospital) were analyzed in order to obtain preliminary DRLs for KAP and Tf during therapeutic ERCP procedures. Non-parametric statistic tests were performed in order to determine a statistically significant relation between KAP and Tf. The resulting third quartiles for KAP and Tf for hospitals (A, B, C and D) were found as followed: KAPA = 10.7 Gy cm 2, TfA = 4.9 min; KAPB = 7.5 Gy cm 2, TfB = 5.0 min; KAPC = 19.0 Gy cm 2, TfC = 7.3 min; KAPD = 52.4 Gy cm 2, TfD = 15.8 min. The third quartiles, calculated for the total 200 cases sample, are: KAP = 18.8 Gy cm 2 and Tf = 8.2 min. For 3 out of 4 hospitals and for the total sample, p -values of statistical indices (correlation of KAP and Tf) are less than 0.001, while for the Hospital A p -values are ranging from 0.07 to 0.08. Using curve fitting, we finally determine that the relation of Tf and KAP is deriving from a power equation (KAP = Tf 1.282 ) with R 2 = 0.85. The suggested Preliminary DRLs (deriving from the third quartiles of the total sample) for Greece are: KAP = 19 Gy cm 2 and Tf = 8 min, while the relation between KAP and Tf is efficiently described by a power equation.