Clinical diagnostic value of spiral CT in invasive pulmonary fungal infection

Purpose: To test the effect of digital compression of CT images on the detection of small linear or spotted high attenuation lesions such as coronary artery calcification (CAC). Material and Methods: Fifty cases with and 50 without CAC were randomly selected from a population that had undergone spiral CT of the thorax for screening lung cancer. CT image data were compressed using JPEG (Joint Photographic Experts Group) or wavelet algorithms at ratios of 10:1, 20:1 or 40:1. Five radiologists reviewed the uncompressed and compressed images on a cathode-ray-tube. Observer performance was evaluated with receiver operating characteristic analysis. Results: CT images compressed at a ratio as high as 20:1 were acceptable for primary diagnosis of CAC. There was no significant difference in the detection accuracy for CAC between JPEG and wavelet algorithms at the compression ratios up to 20:1. CT images were more vulnerable to image blurring on the wavelet compression at relatively lower ratios, and "blocking" artifacts occurred on the JPEG compression at relatively higher ratios. Conclusion: JPEG and wavelet algorithms allow compression of CT images without compromising their diagnostic value at ratios up to 20:1 in detecting small linear or spotted high attenuation lesions such as CAC, and there was no difference between the two algorithms in diagnostic accuracy.

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Clinical Diagnostic Value of Two-Dimensional and Four-Dimensional Echocardiography in Fetal Cardiac Tumor

Tobacco Regulatory Science ◽

10.18001/trs.7.5.44 ◽

2021 ◽

Vol 7 (5) ◽

pp. 1271-1278

Author(s):

Jing Wang ◽

Yu Zhang ◽

Yushi Zhang ◽

Lin Zhang* ◽

Xiaojie Pan ◽

...

Keyword(s):

Clinical Diagnosis ◽

Cardiac Tumor ◽

Diagnostic Value ◽

Ultrasonic Diagnosis ◽

Pathological Examination ◽

Two Dimensional ◽

Clinical Diagnostic ◽

Dimensional Echocardiography ◽

Sensitivity Specificity ◽

Two Dimensional Echocardiography

This paper aims to investigate the clinical diagnostic value of two-dimensional and four-dimensional echocardiography in fetal cardiac tumor. Material and Methods: A total of 24 pregnant women whose fetus had suspected cardiac tumor in The No.4 Hospital 1946 Jinan Shandong from February 2011 to April 2018 were selected as objects of study, including 18 cases whose fetus was pathologically diagnosed with fetal cardiac tumor (+) and 6 cases whose fetus was diagnosed with fetal cardiac tumor (−). Results:These patients were retrospectively analyzed. The tumor site, size, activity and fetal edema predicted using two-dimensional and four-dimensional ultrasound images were compared with pathological examination results, and the diagnostic value of the two kinds of echocardiography in fetal cardiac tumor was analyzed. The echocardiographic results revealed that there were no statistically significant differences in the four-dimensional ultrasonic diagnosis and two-dimensional ultrasonic diagnosis results compared with pathological diagnosis results (p>0.05). In terms of the diagnostic value, the sensitivity, specificity and diagnostic accordance rate in the clinical diagnosis of fetal cardiac tumor were 66.67%, 50.00% and 62.5%, respectively, in two-dimensional echocardiography, and 94.44%, 83.33% and 91.67%, respectively, in four-dimensional echocardiography. Conclusions: Echocardiography can determine the activity, shape, site, size, etc., of primary cardiac tumor. Two-dimensional and four-dimensional ultrasonic diagnosis can be used to observe the fetal cardiac tumor, thus making an early diagnosis. The sensitivity, specificity and diagnostic accordance rate of four-dimensional echocardiography in the clinical diagnosis of fetal cardiac tumor are significantly higher than those of two-dimensional echocardiography, so four-dimensional echocardiography has higher diagnostic value in fetal cardiac tumor.

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Diagnostic Value of 128-slice Spiral CT Combined with Virtual Colonoscopy for Colorectal Cancer

Current Medical Science ◽

10.1007/s11596-019-2013-7 ◽

2019 ◽

Vol 39 (1) ◽

pp. 146-152

Author(s):

Wen-juan Tang ◽

Zhuang Nie ◽

Wen-liang Fan ◽

Lan Cheng ◽

Zi-qiao Lei ◽

...

Keyword(s):

Colorectal Cancer ◽

Virtual Colonoscopy ◽

Spiral Ct ◽

Diagnostic Value

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Performance of magnetic resonance angiography in suspected acute pulmonary embolism

Thrombosis and Haemostasis ◽

10.1160/th04-08-0495 ◽

2005 ◽

Vol 93 (03) ◽

pp. 503-511 ◽

Cited By ~ 39

Author(s):

Abdelouahab Bellou ◽

Francis Guillemin ◽

Philippe Douek ◽

Marie-Claude Laprévote-Heully ◽

Denis Wahl ◽

...

Keyword(s):

Pulmonary Embolism ◽

Magnetic Resonance ◽

Magnetic Resonance Angiography ◽

Spiral Ct ◽

Diagnostic Value ◽

Pulmonary Angiography ◽

Observer Agreement ◽

Prospective Clinical Study ◽

Diagnostic Strategy ◽

Clinical Probability

SummaryPulmonary embolism (PE) is a common and potentially fatal disorder. Non-specific findings make the clinical diagnosis of PE difficult. To assess the diagnostic value and inter-observer agreement of magnetic resonance angiography (MRA) in a cohort of patients with suspected PE, we conducted a prospective clinical study. MRA was compared for sensitivity and specificity to a diagnostic strategy including clinical probability, D-dimer testing, spiral CT, ultrasound leg compression and pulmonary angiography. A total of 89 patients with clinically suspected PE were included: the clinical probability of PE was intermediate or high in 78, and low in the remaining 11. All patients underwent mono-or multi-slice spiral CT and MRA with gadolinium injection (both within 24 hours of entry to the study). Anticoagulation was withheld in patients concerned about the strategy. All subjects were followed up for 3 months. MRA was read independently by two experienced teams of radiologists: one local and one from another university centre. Spiral CT was positive in 62 of 63 cases of confirmed PE. No patient with negative CT findings was positive ultrasonographically. Only one patient with a negative CT (and negative ultrasound) had a recurrent thromboembolic event. The first team diagnosed PE with MRA in 47 cases, with a sensitivity of 71% and a specificity of 92%; the second team obtained the diagnosis in 23 cases, with a sensitivity of 31% and a specificity of 85%. Inter-observer agreement between MRA reading was low: Kappa = 0.16 (-0.01 to 0.33); p = 0.07. In conclusion, compared with a non-invasive strategy based on spiral CT, the diagnostic value of MRA is limited by poor inter-observer agreement.

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