نوع مقاله : مقاله های پژوهشی
نویسندگان
1 دانشجوی پزشکی عمومی، دانشکدهی پزشکی، دانشگاه علوم پزشکی همدان، همدان، ایران
2 استادیار، گروه رادیولوژی، دانشکدهی پیراپزشکی، دانشگاه علوم پزشکی همدان، همدان، ایران
3 استادیار، گروه رادیولوژی، دانشکدهی پزشکی، دانشگاه علوم پزشکی همدان، همدان، ایران
4 دانشیار، گروه اپیدمیولوژی، دانشکدهی بهداشت، دانشگاه علوم پزشکی همدان، همدان، ایران
چکیده
تازه های تحقیق
محمد حسینی: Google Scholar, PubMed
سلمان جعفری: Google Scholar, PubMed
سهراب کولیوند: Google Scholar, PubMed
یونس محمدی: Google Scholar, PubMed
کریم قاضی خانلوثانی: Google Scholar, PubMed
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Background: Pulmonary CT angiography (PCTA) is considered a standard method in the diagnosis of pulmonary embolism. In addition to incorrect diagnosis, the poor image quality in this method increases the radiation dose to the patient. This study aimed to investigate the effect of scan direction on image quality and absorbed dose
in PTCA.
Methods: A total of 126 patients referred for PTCA by a 16-slice CT scanner (Siemens) were examined
(63 persons for each scan direction). Two experienced radiologists in the field of CT angiography assessed the images. Volume CT dose index (CTDIvol) and dose length product (DLP) were used to evaluate the patient's dose.
Findings: The finding in caudocranial and craniocaudal scan directions was sequential as follows: the appropriate phase of imaging 96.8 and 95.2% (P = 0.73), the possibility of detecting embolism 100% and 98.4% (P = 0.36), the presence of superior vena cava artifact 30.2 and 22.2 percent (P = 0.31), motion artifact caused by breathing in the image 11.1 and 4.3 percent (P = 0.53) and the observation of contrast media in aorta 17.5 and 7.9 percentage was (P = 0.1). The average CTDIvol was 8.63 ± 3.53 and 8.66 ± 2.24 mGy (P = 0.04).
Conclusion: The scan direction does not significantly affect the image quality in PCTA, but the volume CT dose index in the caudocranial direction was lower than the craniocaudal.
کلیدواژهها [English]