Resistive index and peak systolic velocity for congenital talipes equinovarus: A color Doppler ultrasonography study

Object. The value of transcranial Doppler ultrasonography for the detection of middle cerebral artery (MCA) spasm has been asserted. None of the published studies, however, has adequately scrutinized the overall diagnostic accuracy of this procedure. There are only sporadic reports concerning the utility of transcranial color Doppler (TCCD) ultrasonography, although this method has been proved to be more precise. In this study the authors attempted to estimate the performance of TCCD ultrasonography in detecting MCA narrowing by using receiver operating characteristic (ROC) curve analysis, based on TCCD studies obtained in a relatively large, randomly selected population of patients. Methods. Transcranial color Doppler ultrasonography studies were obtained in 100 consecutive patients (54 men and 46 women ages 18–74 years, median age 50 years) routinely referred by neurosurgeons for intraarterial angiography. The M1 segment of the MCA was insonated using a 2.5-MHz probe via a temporal acoustic window, and angle-corrected flow velocities were obtained. Angiographically depicted vasospasm was graded as none, mild (≤ 25% vessel caliber reduction), and moderate to severe (> 25% vessel caliber reduction). The effectiveness of TCCD ultrasonography in diagnosing MCA spasm was evaluated by calculating the areas under the ROC curves (Az). Of the 200 MCAs examined, 173 were successfully visualized with the aid of TCCD ultrasonography. Mild vasospasm was angiographically diagnosed in 15 arteries and moderate-to-severe vasospasm in 28. The best-performing TCCD parameter for the detection of MCA narrowing was revealed to be peak systolic velocity. The Az value for moderate-to-severe vasospasm only was 0.93 and that for all vasospasms was 0.8. The best efficiency, that is, the optimal tradeoff between sensitivity and specificity in diagnosing vasospasms, was associated with a peak systolic velocity of 182 cm/second. Conclusions. The performance of TCCD ultrasonography in the diagnosis of advanced MCA narrowing is very good, and is acceptable for all vasospasms. The best-performing parameter was peak systolic velocity.

Download Full-text

Diagnostic Utility of Mean Peak Systolic Velocity of Superior Thyroid Artery in Differentiating Graves’ Disease from Thyroiditis

Indian Journal of Radiology and Imaging ◽

10.1055/s-0041-1734360 ◽

2021 ◽

Author(s):

Pradosh K. Sarangi ◽

Sasmita Parida ◽

Swayamsidha Mangaraj ◽

Binoy K. Mohanty ◽

Jayashree Mohanty ◽

...

Keyword(s):

Blood Flow ◽

Sensitivity And Specificity ◽

Doppler Ultrasonography ◽

Color Doppler ◽

Peak Systolic Velocity ◽

Color Doppler Ultrasonography ◽

Superior Thyroid Artery ◽

Control Group ◽

Graves Disease ◽

Flow Parameters

Abstract Background Differentiating Graves’ disease from thyroiditis can be at times clinically challenging. The gold standard test (thyroid nuclear imaging scan) is expensive, not routinely available, and has radiation exposure. Color Doppler ultrasonography of thyroid represents a suitable alternate which can be used for differentiating these conditions by studying thyroid blood flow parameters. Aim We aimed to investigate the use of thyroid blood flow parameters’ assessment of the superior thyroid artery (STA) and common carotid artery (CCA) with color Doppler ultrasonography for differentiating Graves’ disease from thyroiditis. Materials and Methods This is a cross-sectional study on 111 patients with newly diagnosed thyrotoxicosis (82 with Graves’ disease and 29 with thyroiditis) and 45 years of age and sex-matched healthy controls. All patients underwent detailed clinical and necessary investigations. Color Doppler ultrasonography of the thyroid gland and spectral flow analysis of both superior thyroid arteries was done using standard protocol. Sensitivity and specificity for mean peak systolic velocity of STA (STA-PSV) cut-offs were calculated using receiver operating characteristic curves. Results Patients with Graves’ disease have significantly higher free tri-iodothyronine (FT3) levels, free thyroxine (FT4) levels, antithyroid stimulating hormone receptor antibody (TRAb) levels, and thyroid volume as compared with those with thyroiditis. The mean STA-PSV of patients with Graves’ disease was significantly higher than thyroiditis and control group. Mean STA-PSV greater than 54.3 cm/s had 82.9% sensitivity and 86.2% specificity in diagnosing Graves’ disease. Mean PSV-STA/PSV-CCA ratio of 0.40 was 80.5% sensitive and 86.2% specific for Graves’ disease. Conclusion Mean STA-PSV has high sensitivity and specificity in differentiating Graves’ disease from thyroiditis and can be used routinely in clinical practice as a cheap and invaluable diagnostic tool.

Download Full-text

Efficacy of the Resistive Index of Color Doppler Ultrasonography in Differential Diagnosis of Benign and Malignant Hepatic Space Occupying Lesions

Journal of Shaheed Suhrawardy Medical College ◽

10.3329/jssmc.v6i1.31489 ◽

2017 ◽

Vol 6 (1) ◽

pp. 27-30

Author(s):

Farhana Shimu ◽

Enayet Karim ◽

Abul Hashem Khan ◽

Akhter Ahmed ◽

Sultana Parvin ◽

...

Keyword(s):

Blood Flow ◽

Differential Diagnosis ◽

Doppler Ultrasonography ◽

Malignant Tumors ◽

Color Doppler ◽

Resistive Index ◽

Color Doppler Ultrasonography ◽

Arterial Flow ◽

Arterial Blood Flow ◽

Doppler Spectrum

Background: Write the background in 1 to 2 sentences.Objective: The purpose of the present study was to estimate the efficacy of resistive index (RI) of color Doppler ultrasonography in different space occupying liver lesions.Methodology: This cross sectional study was conducted at in Bangabandhu Sheik Mujib Medical University (BSMMU), Dhaka from July 2010 to December 2012. All the patients presented with the suspicion of hepatic space occupying lesions were enrolled for this study who were later diagnosed clinically or ultrasonographically. This patients were also examined by color Doppler flow imaging. All patients were examined by gray scale ltrasonography, color Doppler and FNAC. To visualize the blood flow, standard color Doppler sonography is used for each lesion. Within the lesions, pulsed Doppler samples are assessed whenever possible on the basis of pulsatile flow. At least three measurements of resistive index (RI) of intra tumoral and peritumoral arterial blood flow would be the last mean value.Results: The detection rate of arterial flow in primary malignant tumors was 94.4% and 87.7% in hepatic metastasis. Doppler spectrum analysis showed the resistance index in primary malignant tumor was 0.75±0.12, 0.73±0.09 in metastatic tumor and was below 0.6 in benign lesions. The difference was significant (p<0.001). This difference was related with its histopathologic structure. The arterial flow with RI >0.6 in CDFI within the liver lesion can be regarded as a criterion of malignant tumors, RI <0.6 can be regarded as benign lesions.Conclusion: RI is more helpful in differential diagnosis of benign and malignant lever lesions.J Shaheed Suhrawardy Med Coll, June 2014, Vol.6(1); 27-30

Download Full-text