Organ and effective doses of patients arising from coronary angiography and percutaneous transluminal coronary angioplasty at two hospitals in Mashhad-Iran

Abstract

A detailed study of radiation doses received by 83 patients who underwent coronary angiography (CA) and 26 patients who underwent percutaneous transluminal coronary angioplasty (PTCA) by the femoral route in two hospitals in Mashhad-Iran is presented. All procedures were undertaken with Siemens angioscope X-ray equipment. Thermoluminescent dosimeters (TLD-100), suitably calibrated, were used to measure the dose received at five locations on the patient's skin (on the thyroid, gonads and lens of eyes). A dose area product (DAP) meter was also used. DAP values and fluoroscopy times were recorded for each patient. The mean values for DAP were 32.47+/-4.03 and 44.49+/-5.64 Gy cm2 for CA and PTCA, respectively. The patient dosimetry results revealed the thyroid receives the highest dose in CA and PTCA examinations. Also, in this study, DAP to effective dose conversion factors were estimated by means of a Rando phantom and the effective dose received by the patients was estimated for CA and PTCA examinations. The estimated mean values of effective dose were 6.75+/-0.85 and 9.61+/-1.24 mSv, respectively.

Interventional Cardiology-Eight Years of Practice: Do Increased Experience and Technological Evolution Lead to Undertaking More Difficult Cases and Higher Patient Doses?

“…It has to be highlighted however that slight differences were noticed between the values of conversion factor calculated by Uniyal et al [4] and Betsou et al, which were 0.183 mSv/ Gy•cm 2 . Nevertheless, although E is derived from P KA by using a single multiplicative factor, it provides a convenient way to judge patient doses [26][27][28][29][30][31][32][33][34][35].…”

“…CA PTCA Pantos [12] Katritsis [29] Toossi [30] Uniyal [4] Bogaert [13] Signorotto [8] mean Effective Dose (mSv) CA PTCA …”

Radiation Dose to the Thyroid and Gonads in Patients Undergoing Cardiac CT Angiography

“…Its anatomical position is such that this gland is exposed directly or indirectly when adjacent body parts are imaged, particularly during cardiac CT angiography when patients are placed in the supine position and the neck is extended. The radiation dose to the thyroid during different radiological examinations has been evaluated (9, 10) and the risk of cancer in the thyroid gland due to the received radiation dose has been assessed by groups of researchers (11). The gonad as another radiosensitive organ must be protected from ionizing radiation due to the risk of hereditary effects of ionizing radiation in young patients (12).…”

In vivo δοσιμετρία σε ασθενείς που υποβάλλονται σε ακτινολογικές εξετάσεις. Ανάλυση δόσης και καθορισμός διαγνωστικών επιπέδων αναφοράς

“…Εκτιµήσεις της ενεργού δόσης έχουν γίνει µε την χρήση καταλλήλων παραγόντων µετατροπής. Τέτοιου είδους παράγοντες έχουν υπολογιστεί να είναι µεταξυ 0,183 και 0,220 mSv Gy -1 cm -2 για την περιοχή του θώρακα [80,119,120,121].…”

“…Ο Bahreyni Toossi και οι συν. [121], αναφέρουν τιµή DAP ίση µε 32,47 Gycm 2 , τιµή σχεδόν ίση µε αυτήν της Betsou [120]. Ο Clark και οι συν.…”