Externe und interne Umfeldeinflüsse wie veränderte Kundenwünsche oder höhere Qualitätsanforderungen führen zu Veränderungen, an die die Produktion anzupassen ist. Dazu sind auch Produktionsprozesse im Sinne der Abwicklung von Aufträgen und der Produktherstellung kurzfristig an diese Veränderungen anzupassen und darüber hinaus in der laufenden Produktion weiter zu verbessern [1]. Ziele der darau...

Objective This study was carried out to analyze the effect of varying kilovoltage peak (kVp) on Hounsfield unit (HU) for various tissue substitutes in two different phantoms and their dosimetric impact dose calculation Monaco treatment planning system version 5.11.02. Methods HU density materials obtained from computed tomography images acquired at kVps (80, 100, 120). Two (CatPhan 503 CIRS 062...

The purpose of this study was to evaluate scatter radiation dose to the subject surface during X-ray computed tomography (CT) fluoroscopy using the integrated dose ratio (IDR) of an X-ray dose profile derived from an optically stimulated luminescent (OSL) dosimeter. We aimed to obtain quantitative evidence supporting the radiation protection methods used during previous CT fluoroscopy. A multis...

In present PET/CT scanners, PET attenuation correction is performed by relying on the information given by CT scan. In the CT-based attenuation correction methods, dual-energy technique (DECT) is the most accurate approach, which has been limited due to the increasing patient dose. In this feasibility study, we have introduced a new method that can implement dual-energy technique with only a si...

OBJECTIVE To evaluate the image quality and radiation dose of indirect computed tomographic venography (CTV) using 80 kVp with sinogram-affirmed iterative reconstruction (SAFIRE) and 120 kVp with filtered back projection (FBP). MATERIALS AND METHODS This retrospective study was approved by our institution and informed consent was waived. Sixty-one consecutive patients (M: F = 27: 34, mean age...

Abstract Funding Acknowledgements Type of funding sources: None. Background Spectral CT imaging and virtual non-contrast (VNC) reconstruction techniques allow coronary artery calcium score (CACS) calculations from angiography (CCTA) datasets. A novel material decomposition algorithm (PureCalcium, PC) developed for photon-counting detector (PCD-CT) yields the potential further increasing accurac...

Thoracic endovascular aortic repair (TEVAR) is a life-saving therapy for type B dissection (TBAD). However, surveillance computed tomography (CT) scans in post-TEVAR patients are associated with high radiation dose, thus resulting potential risk of radiation-induced malignancy. In this study, we developed patient-specific three-dimensional (3D) printed phantom stent grafts situ, then scanned th...

OBJECTIVE The quality and radiation dose of different tube voltage sets for chest digital radiography (DR) were compared in a series of pediatric age groups. MATERIALS AND METHODS Forty-five hundred children aged 0-14 years (yr) were randomly divided into four groups according to the tube voltage protocols for chest DR: lower kilovoltage potential (kVp) (A), intermediate kVp (B), and higher k...

The aims of this study were to compare the image noise and quality of coronary computed tomographic angiography (CCTA) at 80 kVp with knowledge-based iterative model reconstruction (IMR) to those of CCTA at 100 kVp with hybrid iterative reconstruction (IR), and to evaluate the feasibility of a low-dose radiation protocol with IMR. Thirty subjects who underwent prospective electrocardiogram-gati...

Tungsten functional paper (TFP) is a novel paper-based radiation-shielding material. We measured the shielding ability of TFP against x-rays and gamma rays. The TFP was supplied in 0.3-mm-thick sheets that contained 80% tungsten powder and 20% cellulose (C6 H10 O5 ) by mass. In dose measurements for x-rays (60, 80, 100, and 120 kVp), we measured doses after through 1, 2, 3, 5, 10, and 12 TFP sh...