000			03421cam a2200337 a 4500
003			EG-GiCUC
005			20250223031856.0
008			171212s2017 ua dho f m 000 0 eng d
040			_aEG-GiCUC _beng _cEG-GiCUC
041	0		_aeng
049			_aDeposite
097			_aM.Sc
099			_aCai01.09.05.M.Sc.2017.Ah.E
100	0		_aAhmed Magdy Fouad Mohamed
245	1	0	_aEffect of electric potential difference (kilovoltage) on accuracy of maxillary and mandibular linear measurements of planmeca promax 3d mid® cone beam computed tomography machine : _bDiagnostic accuracy study / _cAhmed Magdy Fouad Mohamed ; Supervised Mushira M. Dahaba , Ahmed M. Abdalsamad
246	1	5	_aللتصويرالمقطعي بالحاسوب مخروطي الشعاع PlanmecaPromax 3D MID® تأثير فرق الجهد الكهربي (كيلو فولت ) علي دقة القياسات الخطيه في الفك العلوى و السفلي لجهاز : _bدراسة دقة تشخيصية
260			_aCairo : _bAhmed Magdy Fouad Mohamed , _c2017
300			_a114 P. : _bcharts , facsimiles , photographs ; _c25cm
502			_aThesis (M.Sc.) - Cairo University - Faculty of Oral and Dental Medicine - Department of Oral (Radiology and Diagnosis)
520			_aObjectives:Assement of accuracy of maxillary and mandibular linear measurements using different electric potential (KVp) in comparison with real linear measurement . Methods: it was performed on twenty two human dry skulls with mandibles acquired from Anatomy Department, Faculty of Medicine, Cairo University, Qassr El EinyHospital, 14mm wax used to simulate soft tissue attenuation , The skulls attached to their mandiles were radiographed using PlanmecaProMax 3D Mid CBCT machine (Asentajankatu, Helsinki, Finland) in Oral and Maxillofacial Radiology Department at Faculty of Oral and Dental Medicine, Cairo University All skulls with their mandibles were radiographed using 8 mA, (Ø20cm x 17 cm) field of view (FOV) using stitching and resolution of 400 æm voxel at an exposure time of 27 seconds. For kilovoltage (kVp), each skull was scanned by 3 different settings 90, 80 and 60 kVp. Real measurements were performed using a digital caliper by two experienced radiologists two weeks interval between first and second readings, the results yielded was subjected to Intra- and inter-observer agreement was assessed using Intra-Class Correlation Coefficient (ICC).Bland-Altman plot (differences-vs-means plot) used to show the agreement between two quantitative measurements by studying the mean difference and constructing limits of agreement . Results: there was inter and inter observer reliability ranging from- ICC (0.998 to 0.999) -which was excellent and according to Bland-Altman statistical test there was excellent correlation between measurements at ( 90-80-60 KVp) and real measurements . Conclusion: Maxillary and mandibular linear measurements driven from CBCT images of PlanamecaPromax 3D Mid® machine using 60, 80, 90 kVp are accurate and reliable for all maxillofacial applications
530			_aIssued also as CD
653		4	_aCBCT
653		4	_aCone beam CT
653		4	_aElectric potential
700	0		_aAhmed M. Abdalsamad , _eSupervisor
700	0		_aMushira M. Dahaba , _eSupervisor
856			_uhttp://172.23.153.220/th.pdf
905			_aNazla _eRevisor
905			_aShimaa _eCataloger
942			_2ddc _cTH
999			_c64004 _d64004