Concluding this chapter, we discuss the potential pitfalls associated with DECT. To evaluate the image quality, radiation dose and diagnostic accuracy of 80kVp, high-pitch CT pulmonary angiography (CTPA) with iterative reconstruction using 20 ml of contrast agent. Objective CT pulmonary angiography (CTPA) is one of the most commonly ordered CT imaging tests. Springer Nature supports a reasonable amount of sharing of research papers by authors, subscribers and authorised users (“Users”), for small-, scale personal, non-commercial use provided that all copyright, trade and service marks and other proprietary notices are maintained. Patients were subdivided into CKD stage III (baseline estimated glomerular filtration rate, 30-59 mL/min per 1.73 m(2)) and CKD stage IV-V (baseline estimated glomerular filtration rate, <30 mL/min per 1.73 m(2)) subgroups and separately underwent propensity score generation, stratification, and 1:1 matching. Three readers independently assessed the image quality on the 3-point scale non-diagnostic, adequate or good-excellent image quality. A radiologic technologist will capture high-resolution CT images while the contrast material flows through the blood vessels. 4841 slices with mean density 280.0 ± 63 HU are analyzed. Premium PDF Package. CT Pulmonary Angiography: Quantification of Pulmonary Embolus as a Predictor of Patient Outcome—Initial Experience1. Closing in on the  Edge: Coronary CT Angiography at 100, 80, and 70 V-Ini, . Continuous developments and improvements in MR angiography techniques offer a valuable and efficient option for certain patient populations without the risk of radiation exposure. CT PULMONARY ANGIOGRAMMr. The purpose of the study was to evaluate 70 kVp dual-source computed tomography pulmonary angiography (CTPA) with reduced iodine load in comparison with single-source 70 and 100 kVp CTPA with standard iodine load regarding image quality and radiation dose. The field of pulmonary embolism imaging has demonstrated continuous evolution in both development of novel techniques and improvement in current technologies, resulting in better detection, decreased radiation exposure, and enhanced functional information beyond morphologic characterization of the pulmonary vasculature. In 2000, CTPAs were performed on single or 4 – slice scanners (HiSpeed, GE Healthcare, UK). Computed tomography pulmonary angiography (CTPA) is used for diagnosis. We performed a retrospective analysis to evaluate the diagnostic yield of CTPA at our facility. There are two principal approaches for performing a CTPA of high diagnostic quality: M. KartheeswaranRadiographerSRMC Chennai ... against which all other modalities have beenmeasured. The attenuation of the pulmonary trunk measured in Hounsfield units (HU) between the equivalent axial slices of the LB120 data set and the VMI+40 data set underwent statistical analysis via a Wilcoxon paired-sample test. Compared with group A, the average dose-length product was 59% lower in group B (67.3±11.8 vs. 164.7±50.6 mGy cm, P<0.001) and similar between groups A and C (167.7±41.2 mGy cm, P=0.39). 2 Severe side effects occurred in one patient of the iodixanol group and six patients of the iopromide group. As such, STARD 2015 may help to improve completeness and transparency in reporting of diagnostic accuracy studies. Results One patients had an increase in serum creatinine level of 44.2 μ mol/L or more in the iodixanol group, and 11 patients in the iopromide group. Average SNR and CNR were significantly higher for group C (21.5±4.7 and 19.0±4.5, respectively) compared with groups A (18.3±3.5 and 15.8±3.4, respectively) and B (17.3±5.8 and 15.6±5.5, respectively; all Ps≤0.001). Materials and methods: To assess image quality, radiation dose, and diagnostic accuracy of 70-kVp high-pitch computed tomography pulmonary angiography (CTPA) using 40 mL contrast agent and sinogram affirmed iterative reconstruction (SAFIRE) compared to 100-kVp CTPA using 60 mL contrast agent and filtered back projection. (email: Content courtesy of Springer Nature, terms of use apply. The 1:1 matching on the basis of the propensity score yielded a cohort of 21 346 patients (10 673 in the contrast group, 10 673 in the noncontrast group). Eighty patients underwent CTPA at either 70 kVp (group A, n = 40; 3.2 pitch, 40 mL contrast medium, and SAFIRE) or 100 kVp (group B, n = 40; 1.2 pitch, 60 mL contrast medium, and filtered back projection). Objective: The detection rate of pulmonary emboli (PE) with computed tomography angiography (CTA) using either a standard or a low-dose protocol, combining reduced radiation exposure and iodine delivery rate, was retrospectively analyzed in a matched cohort of 120 patients. CT pulmonary angiography and triple rule-out scanning protocols All patients were scanned on a second generation of dual-source CT scanner (Siemens Definition Flash, Siemens Healthcare, Forchheim, Germany). Simplified image reconstruction work flow of the monoenergetic reconstruction algorithm. This IRB-approved study comprised 150 patients with suspected pulmonary embolism (78 male; mean age 65 ± 17years). 12) are the most popular and investigated applications of DECT that can be used to improve detection and conspicuity of disease as well as objective and subjective image quality. [14] and Mathias et al. The Challenges in Assessing Contrast-Induced Nephropathy: Where Are We Now? 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