AIMS: To report on the intraindividual and interindividual variability of tumour size (height and base diameter) measurements using standardised echography in a masked prospective study. METHODS: 20 consecutive eyes of 20 patients were examined on four different visits by three experienced examiners using standardised echography. As common in standardised echography, tumour height was evaluated with A-scan technique, while transverse and longitudinal base diameter were calculated with B-scan. RESULTS: Tumour height measurements using A-scan were more accurate than base diameter measurements using B-scan. The standard deviation for tumour height over all visits/measurements was 0.18 mm (A-scan), 0.79 mm for transverse, and 0.69 mm for longitudinal base diameters (B-scan). The interclass correlation coefficient (ICC) was much higher for tumour height measurements with A-scan (0.7735 for three examiners on one visit) than for transverse (0.6563) or longitudinal (0.4522) base diameter measurements with B-scan techniques. CONCLUSIONS: A-scan techniques for tumour height measurements provide very reproducible results with little intraindividual and interobserver variability. As B-scan techniques for tumour base evaluation are less accurate they should be used for topographic and morphological examinations.
AIMS: To report on the intraindividual and interindividual variability of tumour size (height and base diameter) measurements using standardised echography in a masked prospective study. METHODS: 20 consecutive eyes of 20 patients were examined on four different visits by three experienced examiners using standardised echography. As common in standardised echography, tumour height was evaluated with A-scan technique, while transverse and longitudinal base diameter were calculated with B-scan. RESULTS:Tumour height measurements using A-scan were more accurate than base diameter measurements using B-scan. The standard deviation for tumour height over all visits/measurements was 0.18 mm (A-scan), 0.79 mm for transverse, and 0.69 mm for longitudinal base diameters (B-scan). The interclass correlation coefficient (ICC) was much higher for tumour height measurements with A-scan (0.7735 for three examiners on one visit) than for transverse (0.6563) or longitudinal (0.4522) base diameter measurements with B-scan techniques. CONCLUSIONS: A-scan techniques for tumour height measurements provide very reproducible results with little intraindividual and interobserver variability. As B-scan techniques for tumour base evaluation are less accurate they should be used for topographic and morphological examinations.
Authors: Arthur J Mueller; William R Freeman; Ulrich C Schaller; Anselm Kampik; Robert Folberg Journal: Ophthalmology Date: 2002-12 Impact factor: 12.079
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Authors: I W Reiniger; U C Schaller; C Haritoglou; R Hein; A K Bosserhoff; A Kampik; A J Mueller Journal: Graefes Arch Clin Exp Ophthalmol Date: 2005-05-20 Impact factor: 3.117
Authors: Jesse L Berry; Francis L Munier; Brenda L Gallie; Ashley Polski; Sona Shah; Carol L Shields; Dan S Gombos; Kathleen Ruchalski; Christina Stathopoulos; Rachana Shah; Rima Jubran; Jonathan W Kim; Prithvi Mruthyunjaya; Brian P Marr; Matthew W Wilson; Rachel C Brennan; Guillermo L Chantada; Murali M Chintagumpala; A Linn Murphree Journal: Pediatr Blood Cancer Date: 2021-02-23 Impact factor: 3.167