Development of CT Development of the Computed Tomography (CT) Scanner Sue Edyvean St. George’s Hospital, London

Development of CT Computed Tomography Images ‘slices’ through the patient –‘Graphia’ – to write, to draw –‘Tomos’ – cut, incision, section –‘Computed’ – determined by mathematical methods

Development of CT CT scanner developed at EMI Medical by Godfrey Hounsfield Development of the CT Scanner

Development of CT Prototype installed at Atkinson Morley’s Hospital, Wimbledon, London Development of the CT Scanner

Development of CT Support of Dr James Ambrose, Neuro-radiologist AMH Development of the CT Scanner Godfrey Hounsfield, James Ambrose

Development of CT 1st clinical scan 1 st October 1971 Development of the CT Scanner

Development of CT Godfrey Hounsfield – EMI, inventor of clinical CT 1971 (design) –1979 Nobel prize (jointly with Cormack) Dr. James Ambrose – Neuroradiologist AMH (clinical) –Standing ovation at RSNA 1972 Dr. BJ Perry – Head of Medical Physics SGH/AMH (radiation) –Dosimetry and image quality, measurements and methods British Journal of Radiology 1973 – three linked papers Godfrey Hounsfield James Ambrose John Perry (GH died Aug 12th 2004, JA died March 12th 2006)

Development of CT CT scanner development x (8 – 10 mm), first dual slice scanner, 80 x 80 matrix 4 min per rotation

Development of CT Data tapes sent away overnight for image reconstruction Paper (CT numbers) or polaroid (Scan numbers 200 and 215, images A and B refer to the two slices imaged simultaneously) Early Clinical Images - AMH Scanner

Development of CT CT scanner development 1971 Scanner is now in the science museum

Development of CT Godfrey Hounsfield – Nobel Speech 1979 Fig. 14 shows a picture from the experiment. The heart chambers can be discerned by a little intravenous injected contrast media. A further promising field may be the detection of the coronary arteries. …. It may be possible to detect these under special conditions of scanning.

Development of CT 2010 Scanning the heart has become a reality SOMATOM Definition Flash Temp res. 75 ms Coll. 128 x 0.6 mm Spatial res mm 350 ms for 149 mm Rotation 0.28 s 100 kV, 290 mAs/ rotation 0.90 mSv

Development of CT Development of the CT Scanner

Development of CT Early Clinical Images 1st ever 3-D CT clinical images. Carried out in AMH physics Dept.