title: Dose reduction in chest CT examination.
abstract: Computed tomography (CT) examinations involve relatively high doses to patients. The objectives of this study were to optimise the radiation dose for patient during CT chest scan and to estimate the lifetime cancer risk. A total of 50 patients were studied: control group (A) (38 patients) and optimisation group (B) (12 patients). The optimisation protocol was based on CT pitch increment and lowering tube current. The mean volume CT dose index (CTDI vol) was 21.17 mGy and dose length product (DLP) was 839.0 mGy cm for Group A, and CTDI vol was 8.3 mGy and DLP was 339.7 for Group B. The overall cancer risk was estimated to be 8.0 and 3.0 cancer incidence per million for Groups A and B, respectively. The patient dose optimisation during CT chest was investigated. Lowering tube current and pitch increment achieved a radiation dose reduction of up to 60 % without compromising the diagnostic findings.
authors.affiliation: Radiology and Medical Imaging Department, College of Applied Medical Sciences, Prince Sattam bin Abdulaziz University, Alkharj, Kingdom of Saudi Arabia College of Medical Radiologic Science, Sudan University of Science and Technology, Khartoum, Sudan abdelmoneim_a@yahoo.com.
authors.forename: A
authors.initials: A
authors.lastname: Sulieman
authors.affiliation: College of Medical Radiologic Science, Sudan University of Science and Technology, Khartoum, Sudan.
authors.forename: N
authors.initials: N
authors.lastname: Tammam
authors.affiliation: Radiological Sciences Department, College of Applied Sciences, King Saud University, Riyadh, Saudi Arabia.
authors.forename: K
authors.initials: K
authors.lastname: Alzimami
authors.affiliation: College of Medical Radiologic Science, Sudan University of Science and Technology, Khartoum, Sudan.
authors.forename: A M
authors.initials: AM
authors.lastname: Elnour
authors.affiliation: Radiological Sciences Department, College of Applied Sciences, King Saud University, Riyadh, Saudi Arabia.
authors.forename: E
authors.initials: E
authors.lastname: Babikir
authors.affiliation: Radiological Sciences Department, College of Applied Sciences, King Saud University, Riyadh, Saudi Arabia.
authors.forename: A
authors.initials: A
authors.lastname: Alfuraih
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D015992:Body Mass Index; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009010:Monte Carlo Method; D009381:Neoplasms, Radiation-Induced / Q000517:prevention & control; D011829:Radiation Dosage; D011835:Radiation Protection / Q000379:methods*; D013902:Radiography, Thoracic / Q000379:methods*; D011874:Radiometry; D012306:Risk; D015898:Tomography Scanners, X-Ray Computed; D014057:Tomography, X-Ray Computed / Q000379:methods*; D055815:Young Adult