EVALUATION OF CBCT SCANS WITH METALLIC ARTIFACTS FOR ASSESSMENT OF DIAGNOSTIC QUALITY

2019 ◽  
Vol 128 (4) ◽  
pp. e162
Author(s):  
K. BABALOLA ◽  
A. TADINADA
Keyword(s):  
Diagnostic Quality ◽  
Metallic Artifacts

Artificial intelligence-guided image acquisition on patients with implanted electrophysiological devices: results from a pivotal prospective multi-center clinical trial

2020 ◽  
Vol 41 (Supplement_2) ◽  
Author(s):  
S Surette ◽  
A Narang ◽  
R Bae ◽  
H Hong ◽  
Y Thomas ◽  
...  
Keyword(s):  
Qualitative Assessment ◽  
Funding Source ◽  
Software Performance ◽  
Private Company ◽  
Diagnostic Quality ◽  
Icd Leads ◽  
Significant Difference ◽  
Level 3 ◽  
And Function ◽  
The Impact

Abstract Background A novel, recently FDA-authorized software uses deep learning (DL) to provide prescriptive transthoracic echocardiography (TTE) guidance, allowing novices to acquire standard TTE views. The DL model was trained by >5,000,000 observations of the impact of probe motion on image orientation/quality. This study evaluated whether novice-acquired TTE images guided by this software were of diagnostic quality in patients with and without implanted electrophysiological (EP) devices, focusing on RV size and function, which were thought to be sensitive to EP devices. Some aspects of the study have previously been presented. Methods 240 patients (61±16 years old, 58% male, 33% BMI >30 kg/m2, 91% with cardiac pathology) were recruited. 8 nurses without echo experience each acquired 10 view TTEs in 30 patients guided by the software. 235 of the patients were also scanned by a trained sonographer without assistance from the software. 5 Level 3 echocardiographers independently assessed the diagnostic quality of the TTEs acquired by the nurses and sonographers to evaluate the effect of EP devices on DL software performance. Results Nurses using the AI-guided acquisition software acquired TTEs of sufficient quality to make qualitative assessments of right ventricular (RV) size and function in greater than 80% of cases for patients with and without implanted EP devices (Table). There was no significant difference between nurse- and sonographer-acquired scans. Conclusion These results indicate that new DL software can guide novices to obtain TTEs that enable qualitative assessment of RV size even in the presence of implanted EP devices. The results of the comparison to sonographer-acquired exams indicate the software performance is robust to presence of pacemaker/ICD leads visible in the images (Figure). Nurse-acquired TTE with visible ICD lead Funding Acknowledgement Type of funding source: Private company. Main funding source(s): Caption Health, Inc.

Combined Muscle Biopsy and Comprehensive Electrophysiology in General Anesthesia is Valuable in Diagnosis of Neuromuscular Disease in Children

2021 ◽  
Author(s):  
Christina E. Hoei-Hansen ◽  
Marie L. B. Tygesen ◽  
Morten Dunø ◽  
John Vissing ◽  
Martin Ballegaard ◽  
...  
Keyword(s):  
Genetic Testing ◽  
Muscle Biopsy ◽  
Neuromuscular Disease ◽  
Genetic Diagnosis ◽  
Congenital Myasthenic Syndrome ◽  
Diagnostic Quality ◽  
Pathogenic Variants ◽  
Combined Use ◽  
Myasthenic Syndrome ◽  
Size Variability

Abstract Aim The diagnostic workup in patients with delayed motor milestones suspected of having either myopathy or a congenital myasthenic syndrome is complex. Our hypothesis was that performance of a muscle biopsy and neurophysiology including stimulated single-fiber electromyography during an anesthetic procedure, combined with genetic testing has a high diagnostic quality. Materials and Methods Clinical and paraclinical data were retrospectively collected from 24 patients aged from 1 month to 10 years (median: 5.2 years). Results Neurophysiology examination was performed in all patients and was abnormal in 11 of 24. No patients had findings suggestive of a myasthenic syndrome. Muscle biopsy was performed in 21 of 24 and was normal in 16. Diagnostic findings included nemaline rods, inclusion bodies, fiber size variability, and type-II fiber atrophy. Genetic testing with either a gene panel or exome sequencing was performed in 18 of 24 patients, with pathogenic variants detected in ACTA1, NEB, SELENON, GRIN2B, SCN8A, and COMP genes. Conclusion Results supporting a neuromuscular abnormality were found in 15 of 24. In six patients (25%), we confirmed a genetic diagnosis and 12 had a clinical neuromuscular diagnosis. The study suggests that combined use of neurophysiology and muscle biopsy in cases where genetic testing does not provide a diagnosis can be useful in children with delayed motor milestones and clinical evidence of a neuromuscular disease.

scholarly journals Understanding PI-QUAL for prostate MRI quality: a practical primer for radiologists

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Francesco Giganti ◽  
Alex Kirkham ◽  
Veeru Kasivisvanathan ◽  
Marianthi-Vasiliki Papoutsaki ◽  
Shonit Punwani ◽  
...  
Keyword(s):  
Diffusion Weighted Imaging ◽  
Signal To Noise Ratio ◽  
High Signal ◽  
Diagnostic Quality ◽  
Prostate Mri ◽  
Prostate Imaging ◽  
Dynamic Contrast Enhanced ◽  
Diffusion Weighted ◽  
Contrast Enhanced

AbstractProstate magnetic resonance imaging (MRI) of high diagnostic quality is a key determinant for either detection or exclusion of prostate cancer. Adequate high spatial resolution on T2-weighted imaging, good diffusion-weighted imaging and dynamic contrast-enhanced sequences of high signal-to-noise ratio are the prerequisite for a high-quality MRI study of the prostate. The Prostate Imaging Quality (PI-QUAL) score was created to assess the diagnostic quality of a scan against a set of objective criteria as per Prostate Imaging-Reporting and Data System recommendations, together with criteria obtained from the image. The PI-QUAL score is a 1-to-5 scale where a score of 1 indicates that all MR sequences (T2-weighted imaging, diffusion-weighted imaging and dynamic contrast-enhanced sequences) are below the minimum standard of diagnostic quality, a score of 3 means that the scan is of sufficient diagnostic quality, and a score of 5 implies that all three sequences are of optimal diagnostic quality. The purpose of this educational review is to provide a practical guide to assess the quality of prostate MRI using PI-QUAL and to familiarise the radiologist and all those involved in prostate MRI with this scoring system. A variety of images are also presented to demonstrate the difference between suboptimal and good prostate MR scans.

scholarly journals Sensitivity and specificity of the Bamberg Dementia Screening Test’s (BDST) full and short versions: brief screening instruments for geriatric patients that are suitable for infectious environments

BMC Medicine ◽  
2021 ◽  
Vol 19 (1) ◽  
Author(s):  
Wolfgang Trapp ◽  
Susanne Röder ◽  
Andreas Heid ◽  
Pia Billman ◽  
Susanne Daiber ◽  
...  
Keyword(s):  
Sensitivity And Specificity ◽  
Short Form ◽  
Neuropsychological Testing ◽  
Screening Tests ◽  
Fine Motor ◽  
Consecutive Series ◽  
Diagnostic Quality ◽  
Dementia Screening ◽  
Increased Risk ◽  
Diagnosis Of Dementia

Abstract Background Currently, many patients suffering from dementia do not have a diagnosis when admitted to geriatric hospitals. This is the case despite an increased risk of complications affecting the length of stay and outcome. Unfortunately, many dementia screening tests cannot be used on geriatric inpatients, who are often bedridden. Therefore, we aimed at evaluating the diagnostic accuracy of a small battery of bedside tasks that require minimal vision and fine motor skills in patients with suspected dementia. Methods In this prospective study, the Bamberg Dementia Screening Test (BDST) was administered to a consecutive series of 1295 patients referred for neuropsychological testing. The diagnosis of dementia was confirmed in 1159 and excluded in 136 patients. Sensitivity and specificity for the first subtest (ultra-short form), the first two subtests (short form), and the total score of the BDST were obtained via receiver operating characteristic curves and compared with the sensitivity and specificity values of the Mini-Mental Status Examination (MMSE). Results The overall diagnostic quality of the BDST was superior to the MMSE for mild Alzheimer’s dementia (sensitivity and specificity = .94 (95% CI .92 to .96) and .82 (95% CI .75 to .88) vs. .79 (95% CI .76 to .83) and .88 (95% CI .82 to .93)) as well as for other subtypes of mild dementia (sensitivity and specificity = .91 (95% CI .88 to .94) and .82 (95% CI .75 to .88) vs. .72 (95% CI .67 to .76) and .88 (95% CI .82 to .93)). Even the short form of the BDST was comparable to the MMSE regarding sensitivity and specificity. For moderate dementia, it was possible to identify dementia cases with sufficient and excellent diagnostic quality by using the ultra-short and the short form. Conclusions The BDST is able to detect dementia in geriatric hospital settings. If the adaptive algorithm is used, administration time can be reduced to less than 2 min in most cases. Because no test materials have to be exchanged, this test is particularly suitable for infectious environments where contact between the examiner and the person being tested should be minimized.

STUDY OF THE PUREPECHA METALS BY PIXE AND METALLOGRAPHY TECHNIQUES

2006 ◽  
Vol 16 (01n02) ◽  
pp. 137-143 ◽  
Author(s):  
U. MÉNDEZ ◽  
D. TENORIO ◽  
G. MURILLO ◽  
B. MÉNDEZ-GARRIDO ◽  
LUIS C. LONGORIA ◽  
...  
Keyword(s):  
Elemental Analysis ◽  
X Ray ◽  
Suitable Technique ◽  
Metallic Artifacts

Proton-Induced-X-Ray-Emission (PIXE) is a suitable technique for the elemental analysis of ancient metallic artifacts, without any deterioration of the samples. Metallography was used to determine the manufacture technique of ancient metallic artifacts. These techniques were applied to study 12 copper artifacts collected, from burial offerings of a "Señor Tarasco", discovered by Eduardo Pareyon, in "El Portal de Matamoros", Uruapan, Michoacán, in 1957.

scholarly journals Intensive care unit physician-delivered point of care renal tract ultrasound in acute kidney injury is feasible

2018 ◽  
Vol 19 (4) ◽  
pp. 313-318 ◽  
Author(s):  
Prashant Parulekar ◽  
Ed Neil-Gallacher ◽  
Alex Harrison
Keyword(s):  
Intensive Care Unit ◽  
Acute Kidney Injury ◽  
Intensive Care ◽  
Critically Ill ◽  
Critically Ill Patients ◽  
Point Of Care ◽  
Kidney Injury ◽  
Diagnostic Quality ◽  
The Core ◽  
Low Incidence

Acute kidney injury is common in critically ill patients, with ultrasound recommended to exclude renal tract obstruction. Intensive care unit clinicians are skilled in acquiring and interpreting ultrasound examinations. Intensive Care Medicine Trainees wish to learn renal tract ultrasound. We sought to demonstrate that intensive care unit clinicians can competently perform renal tract ultrasound on critically ill patients. Thirty patients with acute kidney injury were scanned by two intensive care unit physicians using a standard intensive care unit ultrasound machine. The archived images were reviewed by a Radiologist for adequacy and diagnostic quality. In 28 of 30 patients both kidneys were identified. Adequate archived images of both kidneys each in two planes were possible in 23 of 30 patients. The commonest reason for failure was dressings and drains from abdominal surgery. Only one patient had hydronephrosis. Our results suggest that intensive care unit clinicians can provide focussed renal tract ultrasound. The low incidence of hydronephrosis has implications for delivering the Core Ultrasound in Intensive Care competencies.

Using 100- instead of 120-kVp computed tomography to diagnose pulmonary embolism almost halves the radiation dose with preserved diagnostic quality

2010 ◽  
Vol 51 (3) ◽  
pp. 260-270 ◽  
Author(s):  
Peter Björkdahl ◽  
Ulf Nyman
Keyword(s):  
Computed Tomography ◽  
Pulmonary Embolism ◽  
Image Quality ◽  
Radiation Dose ◽  
Effective Dose ◽  
Ct Number ◽  
Subjective Image Quality ◽  
Diagnostic Quality ◽  
X Ray ◽  
Tube Potential

Background: Concern has been raised regarding the mounting collective radiation doses from computed tomography (CT), increasing the risk of radiation-induced cancers in exposed populations. Purpose: To compare radiation dose and image quality in a chest phantom and in patients for the diagnosis of pulmonary embolism (PE) at 100 and 120 peak kilovoltage (kVp) using 16-multichannel detector computed tomography (MDCT). Material and Methods: A 20-ml syringe containing 12 mg I/ml was scanned in a chest phantom at 100/120 kVp and 25 milliampere seconds (mAs). Consecutive patients underwent 100 kVp ( n = 50) and 120 kVp ( n = 50) 16-MDCT using a “quality reference” effective mAs of 100, 300 mg I/kg, and a 12-s injection duration. Attenuation (CT number), image noise (1 standard deviation), and contrast-to-noise ratio (CNR; fresh clot = 70 HU) of the contrast medium syringe and pulmonary arteries were evaluated on 3-mm-thick slices. Subjective image quality was assessed. Computed tomography dose index (CTDIvol) and dose–length product (DLP) were presented by the CT software, and effective dose was estimated. Results: Mean values in the chest phantom and patients changed as follows when X-ray tube potential decreased from 120 to 100 kVp: attenuation +23% and +40%, noise +38% and +48%, CNR −6% and 0%, and CTDIvol −38% and −40%, respectively. Mean DLP and effective dose in the patients decreased by 42% and 45%, respectively. Subjective image quality was excellent or adequate in 49/48 patients at 100/120 kVp. No patient with a negative CT had any thromboembolism diagnosed during 3-month follow-up. Conclusion: By reducing X-ray tube potential from 120 to 100 kVp, while keeping all other scanning parameters unchanged, the radiation dose to the patient may be almost halved without deterioration of diagnostic quality, which may be of particular benefit in young individuals.

Fine Needle Aspiration: who must perform this Procedure?

2021 ◽  
Vol 4 (5) ◽  
pp. 01-05
Author(s):  
Negri Stefano ◽  
Azzolini Diana ◽  
Corradi Gabriele ◽  
Calabrese Giovanni
Keyword(s):  
Fine Needle Aspiration ◽  
Needle Aspiration ◽  
The Body ◽  
Diagnostic Quality ◽  
Fine Needle ◽  
Pathologic Anatomy ◽  
Historical Moment

In this historical moment, when FNA seems to have lost its paramount importance, it’s necessary to publish the data of the case study carried out from 2007 to 2014 in the pathologic anatomy unit at Carlo Poma Hospital in Mantua. This work includes 5,586 FNAs performed in various parts of the body. In particular, we examined 583 breast FNAs performed by a pathologist without help from a radiologist. The data confirm that it is very important for a pathologist to be present when a sample is being taken as this results in a decrease in the number of inadequate preparations as well as in improved diagnostic quality.

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