The determined dose-length products of the nine examinations were 5.0–111.9 mGy · cm with a calculated effective whole body dose of 20.7–505.9 μSv. Cone-beam CT was in the upper midfield with an effective dose of 229.3 μSv. ... Tin filter protocols (protocols 1–3) showed lower cortical attenuation (difference, ≈ 300 HU) than …
By adding a tin filter to a 150 kVp scan protocol, the mean weighted energy is increased by 37% (98.6 keV) compared to standard 150 kVp imaging. 9 Therefore, spectral shaping via tin prefiltration is nowadays considered a standard procedure, especially for low-dose lung imaging10, 11, 12. In addition to dose saving, the hardened photon spectrum ...
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The other tin filter protocols followed in descending order of increasing tube current, succeeded by the 100 kV protocols without tin filters. ... Estimating Effective Dose for CT Using Dose–Length Product Compared With Using Organ Doses: Consequences of Adopting International Commission on Radiological Protection Publication 103 or Dual ...
MATERIALS AND METHODS. A total of 48 calcium oxalate, calcium phosphate, and uric acid human kidney stone samples were placed in individual containers inside a cylindric water phantom and imaged with a dual-energy CT scanner using the following three scanning protocols of different combinations of tube voltage, with and …
The purpose of this study was to assess the performance of tin filter–based MATERIALS AND METHODS. Unenhanced third-generation dual-source CT scans of 129 consecutively registered patients were retrospectively reviewed: 43 patients underwent CT for detection of renal stones with tin filtration (Sn150 kV); 43 patients underwent a routine low-
OBJECTIVE. The purpose of this study was to assess the performance of tin filter–based spectral shaping CT compared with routine low-dose CT for detection of urolithiasis. MATERIALS AND METHODS. Unenhanced third-generation dual-source CT scans of 129 consecutively registered patients were retrospectively reviewed: 43 patients …
Additional to the overall amount of Xray intensity, the photon counting detector measures each incoming Xray photon individually (see Fig. 2).For being able to stop and detect all X-rays used in medical imaging, a fast semiconductor sensor is needed with a high stopping power, i.e. a high atomic number and therefore weight, like for example …
Background Radiation dose reduction is a primary objective in pediatric populations owing to the well-known risks of radiation-induced cancers. Low-energy photons participate in the radiation dose without significantly contributing to image formation. Their suppression by means of tin filtration should decrease the image noise, anticipating a …
The Tin Filter cuts out lower energies to reduce dose and optimize image quality at the interface between soft tissue and air. This has direct benefits in lung and colon imaging, for example. Clinical experience also shows that …
This study aims streak artifacts reduction in cone-beam computed tomography (CBCT) by mounting tin filters at the Trilogy system. An anthropomorphic phantom with insertions of aluminum and titanium rods was scanned using the standard dose head (SDH) and high-quality head (HQH) CBCT protocols with no tin filters as well …
Radiation dose ranged from 17.4 mGy in the clinical standard protocol without tin filter to as low as 0.7 mGy with tin prefiltration. Image quality ratings and CNR for tin-filtered scans with 100 kV were lower than for 80 kV studies with copper prefiltration despite higher dose (11.2 and 5.6 vs. 4.5 mGy; p < 0.001).
Siemens Healthineers tin filtered 150 kvp Tin Filtered 150 Kvp, supplied by Siemens Healthineers, used in various techniques. Bioz Stars score: 86/100, based on 1 PubMed citations.
Abstract. This specification covers a group of common requirements which shall apply to tin mill products. The steel shall be made by the open-hearth, electric-furnace, or basic-oxygen process. The steel shall conform to specified chemical composition requirements. Rockwell 30T hardness test shall be done to the plates.
CTDI Vol = computed tomography dose index, DLP = dose length product, # = number. ... Ultra-low dose tin filter protocols (Sn 100/25, Sn 100/50) with CTDI Vol of 0.2 mGy and 0.4 mGy were rated worst (median: 4, IQR 1), therefore found insufficient for clinical usage and thus excluded from further analysis. Additionally, more than 10% of the ...
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The image quality in patients with ureteral stents with tin filtering is non-inferior to that in aconventional low-dose protocol. Citation Format Axer B, Garbe S, Hadizadeh DR. Comparative Evaluation of Diagnostic Quality in Native Low-dose CTwithout and with Spectral Shaping employing a Tin Filter in Urolithiasis with implanted Ureteral Stent.
The tin filter, which shields the ... The fact that the noise was higher in group B for comparable effective tube current time products in all groups could be explained by the attenuation due to the tin filter, which leads to a reduction in the number of photons contributing to the image. Overall, we showed that the combination of low-dose CT ...
OBJECTIVE. The objective of this study was to investigate the effect on radiation dose and image quality of the use of additional spectral filtration for dual-energy CT using dual-source CT (DSCT). MATERIALS AND METHODS. A commercial DSCT scanner was modified by adding tin filtration to the high-kV tube, and radiation output and noise were measured in …
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Aldrich - 265640; Tin powder, <150 μm, 99.5% trace metals basis; CAS No. ; catalyst | Find related products, papers, technical documents, MSDS & more at Sigma-Aldrich ... Active Filters. Active Filters 1 star Remove Filter 1 star
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The Tin Filter cuts out lower energies to reduce dose and optimize image quality at the interface between soft tissue and air. This has direct benefits in lung and colon imaging, for example. Clinical experience also shows that Tin Filter technology reduces beam hardening artifacts and improves image quality in bony structures, making it also ...
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The volume CT dose index (CTDIvol) and dose length product (DLP) for each scan were obtained from the patient dose reports. The effective dose (ED) was calculated by multiplying the DLP by the conversion factor (0.014 mSv/mGy·cm). ... In the tin filter groups, the sensitivity, specificity, and accuracy for the diagnosis of malignancy …
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Objectives To evaluate urinary stone detection, radiation exposure, image quality, breathing-motion artifacts, and scanning time with high-pitch tin filter-based abdominopelvic CT. Methods Sixty-three consecutive patients with urolithiasis underwent non-enhanced abdominopelvic CT with both regular (120 kV, pitch 0.6) and low-dose …