SU-FF-I-07: Single- and Dual-Energy CT Calibration Lines for Assessing the Calcium Content of Lung Nodules: Effects of Patient Body and Lung Nodule Size

2007 ◽  
Vol 34 (6Part2) ◽  
pp. 2339-2339
Author(s):  
M Goodsitt ◽  
H Chan ◽  
T Way ◽  
S Larson ◽  
E Christodoulou
Keyword(s):  
Lung Nodule ◽  
Calcium Content ◽  
Dual Energy ◽  
Lung Nodules ◽  
Dual Energy Ct ◽  
Nodule Size

Local Differences in Mineral Content in Vertebral Trabecular Bone Measured by Dual-Energy Computed Tomography

1989 ◽  
Vol 30 (4) ◽  
pp. 369-371 ◽  
Author(s):  
J. Nepper-Rasmussen ◽  
L. Mosekilde
Keyword(s):  
Computed Tomography ◽  
Central Region ◽  
Mineral Content ◽  
Anterior Part ◽  
Posterior Part ◽  
Region Of Interest ◽  
Calcium Content ◽  
Dual Energy ◽  
Dual Energy Ct ◽  
Vertebral Bodies

Twelve lumbar vertebral bodies from cadavers were examined with dual-energy CT, to measure the calcium content in a big central region of interest (ROI). In each of five vertebrae the calcium content was also measured in six small ROI. After completed scanning, six small cylinders were drilled out from each vertebra, and the ash-density of each cylinder was measured. The dual-energy CT measurements correlated well with the ash-density. Both ash-density and dual-energy CT showed a significantly higher mineral content in the posterior part of the vertebrae than in the anterior part, and this difference might be responsible for problems encountered with the reproducibility of dual-energy CT.

Toward a uniform pathway in managing incidental lung nodules on computerised tomography [CT] coronary angiography; for a cost effective and safe outcome

2020 ◽  
Vol 41 (Supplement_2) ◽  
Author(s):  
V Kanthasamy ◽  
A Mahmood ◽  
S Karde ◽  
S Mason ◽  
A Marshall ◽  
...  
Keyword(s):  
Cost Effectiveness ◽  
Coronary Angiography ◽  
Lung Nodule ◽  
Pain Clinic ◽  
Lung Nodules ◽  
British Thoracic Society ◽  
Team Approach ◽  
Nodule Size ◽  
Interval Change

Abstract Background National Institute for Health and Care Excellence guidelines (NICE CG95) recommends computed tomography coronary angiography [CTCA] as the first line investigation for all patients with suspected typical or atypical angina irrespective of pre-test probability due to its excellent performance and cost effectiveness. However previous cost effectiveness analyses have not factored in the burden of lung nodules [LN] or extracardiac incidentalomas, which are commonly identified on CTCA. Purpose As we increasingly detect LN on CTCA scans, it is prudent that a uniform pathway is followed for surveillance of LN. The British Thoracic Society (BTS) has enabled evidence-based development of an algorithm for the management of LN which defines a cut off LN size of ≥5mm requiring further follow up. We aimed to assess the compliance of LN follow up in our patients according to radiology recommendation on CTCA reports and also to assess how well these recommendations adhere to BTS guidelines. Method 117 patients who underwent CTCA as the initial diagnostic investigation were retrospectively identified from the rapid access chest pain clinic database. Data was collected during a 1 year period between January - December 2017. Data was analysed to determine whether appropriate surveillance pathway was followed for repeat imaging. According to BTS guidelines, nodules ≥5mm should have a systematic work up for surveillance and hence we have stratified our data based on the nodule size. In case of multiple nodules, the largest nodule size was considered. Results Out of 117 patients, 77% patients were female with average age 57.8±9.0 years. 40% patients were found to have incidental LN with an average size of 4.63±1.92mm; 44% had a history of cigarette smoking. Among patient with nodules, 22 (19%) had CT thorax to assess interval change and interestingly 16 (73%) had persisting LN; whereas in 4 (18%), the LN resolved and only 2 (9%) showed increase in LN size. Repeat CT chest was advised for these 2 patients; 1 was advised to undergo biopsy which eventually ruled out malignancy. 6 patients (5%) from group 1 were recommended for repeat CT despite having LN size <5mm. In the remaining 25 patients (21%) with LN, 15 (60%) did not have further surveillance imaging even though this was recommended by the reporting radiologist. Of these only 3 (12%) had LN ≥5mm which qualified for surveillance CT. Conclusion CTCA frequently detects incidentalomas especially LN which cannot be overlooked and require further imaging irrespective of the primary presentation. Our findings also suggest a discrepancy on surveillance CT recommendation against the current BTS guidelines, with potential significant impact on the overall cost effectiveness of CTCA. A systematic approach to LN surveillance could be best achieved with a multidisciplinary team approach (e.g. referral pathway to nodule MDT) and adherence to a standard guideline. Lung nodule surveillance following CTCA Funding Acknowledgement Type of funding source: None

scholarly journals Assessment of Solitary Pulmonary Nodules Based on Virtual Monochrome Images and Iodine-Dependent Images Using a Single-Source Dual-Energy CT with Fast kVp Switching

2020 ◽  
Vol 9 (8) ◽  
pp. 2514
Author(s):  
Arkadiusz Zegadło ◽  
Magdalena Żabicka ◽  
Marta Kania-Pudło ◽  
Artur Maliborski ◽  
Aleksandra Różyk ◽  
...  
Keyword(s):  
Lung Nodule ◽  
Pulmonary Nodules ◽  
Iodine Concentration ◽  
Modern Medicine ◽  
Dual Energy ◽  
Arterial Phase ◽  
Dual Energy Ct ◽  
Solitary Pulmonary Nodules ◽  
Phase Images ◽  
Venous Phase

With lung cancer being the most common malignancy diagnosed worldwide, lung nodule assessment has proved to be one of big challenges of modern medicine. The aim of this study was to examine the usefulness of Dual Energy Computed Tomography (DECT) in solitary pulmonary nodule (SPN) assessment. Between January 2017 and June 2018; 65 patients (42 males and 23 females) underwent DECT scans in the late arterial phase (AP) and venous phase (VP). We concluded that imaging at an energy level of 65 keV was the most accurate in detecting malignancy in solitary pulmonary nodules (SPNs) measuring ≤30 mm in diameter on virtual monochromatic maps. Both virtual monochromatic images and iodine concentration maps prove to be highly useful in differentiating benign and malignant pulmonary nodules. As for iodine concentration maps, the analysis of venous phase images resulted in the highest clinical usefulness. To summarize, DECT may be a useful tool in the differentiation of benign and malignant SPNs. A single-phase DECT examination with scans acquired 90 s after contrast media injection is recommended.

scholarly journals Quantitative CT of lung nodules: Dependence of calibration on patient body size, anatomic region, and calibration nodule size for single- and dual-energy techniques

2009 ◽  
Vol 36 (7) ◽  
pp. 3107-3121 ◽  
Author(s):  
Mitchell M. Goodsitt ◽  
Heang-Ping Chan ◽  
Ted W. Way ◽  
Mathew J. Schipper ◽  
Sandra C. Larson ◽  
...  
Keyword(s):  
Body Size ◽  
Dual Energy ◽  
Lung Nodules ◽  
Quantitative Ct ◽  
Nodule Size ◽  
Anatomic Region

Dual energy CT Angiographie der Becken Bein Region bei peripherer Verschlusskrankheit

2009 ◽  
Vol 181 (S 01) ◽  
Author(s):  
C Brockmann ◽  
S Jochum ◽  
K Huck ◽  
P Ziegler ◽  
M Sadick ◽  
...  
Keyword(s):  
Dual Energy ◽  
Dual Energy Ct ◽  
Ct Angiographie

Dual-energy CT-Cholangiographie bei potentiellen Spendern für eine Leberlebendtransplantation

2010 ◽  
Vol 182 (S 01) ◽  
Author(s):  
CM Sommer ◽  
CM Schwarzwaelder ◽  
W Stiller ◽  
ST Schindera ◽  
T Heye ◽  
...  
Keyword(s):  
Dual Energy ◽  
Dual Energy Ct
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