Variations in cone beam CT numbers as a function of patient size: in vivo demonstration in bladder cancer patients.
We determined Hounsfield numbers, using cone beam CT (CBCT), in the bladder of 27 muscle invasive bladder cancer patients treated with online adaptive radiotherapy using a Varian linear accelerator. The CBCT number of urine was found to increase by 130 from the thinnest to the largest patient (249 mm to 346 mm average diameter) demonstrating the effect of patient size on Hounsfield number in CBCT in vivo.
Mullen
Ajit
A
Physical Sciences Department, Peter MacCallum Cancer Centre, East Melbourne, Australia. ajit.mullen@petermac.org
Kron
Tomas
T
Thomas
Jessica
J
Foroudi
Farshad
F
D000368:Aged; D000369:Aged, 80 and over; D049628:Body Size; D054893:Cone-Beam Computed Tomography / Q000379:methods*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009361:Neoplasm Invasiveness; D015641:Radiography, Interventional / Q000379:methods*; D012044:Regression Analysis; D016896:Treatment Outcome; D001749:Urinary Bladder Neoplasms / Q000000981:diagnostic imaging* / Q000532:radiotherapy*