scholarly journals Prospective Paired Comparison of 123I-FP-CIT SPECT Images Obtained With a 360°-CZT and a Conventional Camera

2022 ◽  
Vol 47 (1) ◽  
pp. 14-20
Author(s):  
Yuliya Piatkova ◽  
Pierre Payoux ◽  
Caroline Boursier ◽  
Manon Bordonne ◽  
Veronique Roch ◽  
...  
Keyword(s):  
Paired Comparison ◽  
Spect Images

The effectiveness of low-strength anthralin in psoriasis. A paired comparison study

1982 ◽  
Vol 118 (11) ◽  
pp. 906-908 ◽  
Author(s):  
W. M. Marley
Keyword(s):  
Paired Comparison ◽  
Comparison Study ◽  
Low Strength

Computerized Paired Comparison of Values (CPCV)

2012 ◽  
Author(s):  
Wolfgang Bilsky ◽  
Tobias Gollan ◽  
Hector Grad ◽  
Maria Luisa Mendes Teixeira ◽  
Miryam Rodriguez Monter ◽  
...  
Keyword(s):  
Paired Comparison

Paired Comparison of Iopamidol and Iopromide in Hepatic Arteriography

2003 ◽  
Vol 48 (2) ◽  
pp. 141 ◽  
Author(s):  
Young Ho Choi ◽  
Jin Wook Chung ◽  
Guk Myung Choi ◽  
Chang Jin Yoon ◽  
Keon Ha Kim ◽  
...  
Keyword(s):  
Paired Comparison ◽  
Hepatic Arteriography

99mTc-MIBI SPECT in primary hyperparathyroidism

2008 ◽  
Vol 47 (01) ◽  
pp. 01-07 ◽  
Author(s):  
N. Thoma ◽  
M. Dietlein ◽  
D. Moka ◽  
W. Eschner ◽  
M. Faust ◽  
...  
Keyword(s):  
Vitamin D ◽  
Primary Hyperparathyroidism ◽  
Vitamin D Deficiency ◽  
Statistical Significance ◽  
Negative Influence ◽  
Normal Vitamin ◽  
Planar Images ◽  
99Mtc Mibi ◽  
Mibi Spect ◽  
Spect Images

SummaryAim of the study was to analyse the influence of a concomitant vitamin D deficiency on the results of 99mTc-MIBI studies in patients (pts) with primary hyperparathyroidism (pHPT). Patients, methods: Between January 1998 and May 2004, 71 pts with pHPT had undergone operation after a 99mTc-MIBI study of whom 54 pts (76%) had normal values of 25-OH-vitamin D3 and 17 pts (24%) had vitamin D deficiency. Results of a dual-phase 99mTc-MIBI protocol with SPECT were compared with histopathology. Results: In 54 pts with normal vitamin D values late SPECT images identified more lesions (n = 51, sensitivity 91%) than early planar (n = 45, sensitivity 82%) or late planar images (n = 50, sensitivity 88%). In 17 pts with vitamin D deficiency late SPECT images identified more lesions (n = 13, sensitivity 72%) than early planar (n = 10, sensitivity 56%) or late planar images (n = 10, sensitivity 56%) too. In pts with vitamin D deficiency the sensitivity of a 99mTc-MIBI SPECT study was lower than in those with normal vitamin D status (72% vs. 91%) and dependent on the value for PTH. However, the results did not reach statistical significance: early planar: p = 0.1625; late planar: p = 0.0039; 99mTc-MIBI SPECT: p = 0.1180. Conclusion: The likelihood of a pathological 99mTc-MIBI study being obtained in pts with pHPT is dependent on the parathyroid hormone level. However, a negative influence of a low vitamin D level on the scintigraphic detection rate of a parathyroid adenoma could not be proven which may be due to the low number of pts with vitamin D deficiency.

A Study on the Auxiliary Diagnosis of Thyroid Disease Images Based on Multiple Dimensional Deep Learning Algorithms

2020 ◽  
Vol 16 (3) ◽  
pp. 199-205
Author(s):  
Yuejun Liu ◽  
Yifei Xu ◽  
Xiangzheng Meng ◽  
Xuguang Wang ◽  
Tianxu Bai
Keyword(s):  
Deep Learning ◽  
Learning Algorithms ◽  
Region Of Interest ◽  
Classification Performance ◽  
Thyroid Diseases ◽  
Great Success ◽  
Learning Models ◽  
Good Classification Performance ◽  
Spect Images

Background: Medical imaging plays an important role in the diagnosis of thyroid diseases. In the field of machine learning, multiple dimensional deep learning algorithms are widely used in image classification and recognition, and have achieved great success. Objective: The method based on multiple dimensional deep learning is employed for the auxiliary diagnosis of thyroid diseases based on SPECT images. The performances of different deep learning models are evaluated and compared. Methods: Thyroid SPECT images are collected with three types, they are hyperthyroidism, normal and hypothyroidism. In the pre-processing, the region of interest of thyroid is segmented and the amount of data sample is expanded. Four CNN models, including CNN, Inception, VGG16 and RNN, are used to evaluate deep learning methods. Results: Deep learning based methods have good classification performance, the accuracy is 92.9%-96.2%, AUC is 97.8%-99.6%. VGG16 model has the best performance, the accuracy is 96.2% and AUC is 99.6%. Especially, the VGG16 model with a changing learning rate works best. Conclusion: The standard CNN, Inception, VGG16, and RNN four deep learning models are efficient for the classification of thyroid diseases with SPECT images. The accuracy of the assisted diagnostic method based on deep learning is higher than that of other methods reported in the literature.

scholarly journals Quality and utility of [123I]I-metaiodobenzylguanidine cardiac SPECT imaging in nondiabetic postinfarction heart failure patients qualified for implantable cardioverter defibrillator

2021 ◽  
Author(s):  
Anna Teresińska ◽  
Olgierd Woźniak ◽  
Aleksander Maciąg ◽  
Jacek Wnuk ◽  
Jarosław Jezierski ◽  
...  
Keyword(s):  
Heart Failure ◽  
Implantable Cardioverter Defibrillator ◽  
Left Lung ◽  
Spect Imaging ◽  
Cardiac Innervation ◽  
Cardiac Spect ◽  
Cardioverter Defibrillator ◽  
Planar Images ◽  
Spect Images

Abstract Objective Impaired cardiac adrenergic activity has been demonstrated in heart failure (HF) and in diabetes mellitus (DM). [123I]I-metaiodobenzylguanidine (MIBG) enables assessment of the cardiac adrenergic nervous system. Tomographic imaging of the heart is expected to be superior to planar imaging. This study aimed to determine the quality and utility of MIBG SPECT in the assessment of cardiac innervation in postinfarction HF patients without DM, qualified for implantable cardioverter defibrillator (ICD) in primary prevention of sudden cardiac death. Methods Consecutive patients receiving an ICD on the basis of contemporary guidelines were prospectively included. Planar MIBG studies were followed by SPECT. The essential analysis was based on visual assessment of the quality of SPECT images (“high”, “low” or “unacceptable”). The variables used in the further analysis were late summed defect score for SPECT images and heart-to-mediastinum rate for planar images. MIBG images were assessed independently by two experienced readers. Results Fifty postinfarction nondiabetic HF subjects were enrolled. In 13 patients (26%), the assessment of SPECT studies was impossible. In addition, in 13 of 37 patients who underwent semiquantitative SPECT evaluation, the assessment was equivocal. Altogether, in 26/50 patients (52%, 95% confidence interval 38–65%), the quality of SPECT images was unacceptable or low and was limited by low MIBG cardiac uptake and by comparatively high, interfering MIBG uptake in the neighboring structures (primarily, in the lungs). Conclusions The utility of MIBG SPECT imaging, at least with conventional imaging protocols, in the qualification of postinfarction HF patients for ICD, is limited. In approximately half of the postinfarction HF patients, SPECT assessment of cardiac innervation can be impossible or equivocal, even without additional damage from diabetic cardiac neuropathy. The criteria predisposing the patient to good-quality MIBG SPECT are: high values of LVEF from the range characterizing the patients qualified to ICD (i.e., close to 35%) and left lung uptake intensity in planar images comparable to or lower than heart uptake.

An Analysis of Affect and Expectancy Evaluations in Causal Attributions

1987 ◽  
Vol 60 (3_part_2) ◽  
pp. 1115-1120
Author(s):  
Hirotsugu Yamauchi
Keyword(s):  
High School Students ◽  
Junior High School ◽  
Elementary School Children ◽  
Causal Attributions ◽  
Paired Comparison ◽  
Junior High School Students ◽  
Successful Outcome ◽  
School Students ◽  
The Relationship ◽  
Comparison Data

Two relationships were examined, the relationship between the achievement-related affect and causal attributions for success or failure and the relationship between the expectancy shift and causal ascriptions for success or failure. Subjects were 417 elementary school children, 459 junior high school students, and 175 college students. Two hypothetical boys or girls who received similar marks on an examination but who attributed the results to different causes (ability, effort or luck) were described in a booklet. Subjects were asked to judge which person feels more pleasant (or unpleasant) and which person should expect the same outcome on further similar exams. The method of dual scaling was applied to the paired-comparison data for each sample. Two-dimensional solutions were extracted in the positive affect with success, the expectancy of success after success and the expectancy of failure after failure. Whereas a unidimensional solution was extracted in the negative affect with failure. Developmental shifts were found for successful outcome.

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