Cumulative radiation dose estimation from recurrent CT scan in adult patients with history of cancer in AL Dywanyia city

• Published in: International journal of research in pharmaceutical sciences Vol. 9; no. SPL1
• Main Authors: Majeed, Amjaad, Hameed, Dergham Majeed
• Format: Journal Article
• Language: English
• Published: 15-04-2018
• ISSN: 0975-7538; 0975-7538
• DOI: 10.26452/ijrps.v9iSPL1.1291

Radiation dose from diagnostic imaging techniquesis not monitoring in patients undergorecurrent exposure to radio-diagnosis imaging like X-ray, computed tomography (CT scan) & angiography. Evidence suggest an increased lifetime risk of malignancy of 1% per 100 milisevert (mSv),the recommendation in BEIR 7 report (Seventh Biologic Effect of Ionizing Radiation ) are to restrict healthcare and radiation worker to maximum dose of 20 mSv per year or to 100 mSv over three years period. To estimate the biological effective dose, cumulative radiation dose & risk of malignancy in patients with cancerwho expose to recurrent CT scan for tumor follow up. A prospective studyfrom January 2015 –January 2018 was performed at about 50 patients who have history of malignancy,calculating the biological effective dose in mSv from data obtainedfrom CT software (patient protocol ), than calculating cumulative dose & summationof dose over three years From 50 patients 37of them werefemale & 26% of them were male. Age range 23- 80yr& age mean 55yr,22 (44%) of patients exposed to more than 100mSv in three years, & 29 (58% ) of them are within category 3 b which mean they exposed to the maximum allowed dose level according to (BEIR 7) report, 4% of them are within 3a classification,30% within 2b (have moderate level of risk)& 8% within 2a (intermediate level of riskfor oncologist: balancethe importance of the diagnosis againstpatient cumulativedose exposure should be done in each patient before CT is requested,recordingthe no. type & time of exposed to radiation imaging techniques.For radiologist & radiographer : close follow up & recording ofthe biological radiation dose for each patients who have frequent CT Scan. In machine design: No. of approach should be done in patients who have repeated exposed to CT scan includedtechnical development Special care should be pay to the patient who previously exposed to radiation & are likely to be frequently image in futures. In some case,we can replaced CT scan by MRI imaging for tumor follow up.