scholarly journals Menisco-ligamentous injuries of knee joint: Can ultrasonography serve as an effective screening modality?

2021 ◽  
Vol 9 (1) ◽  
Author(s):  
Farooq Mir ◽  
Zahoor Raina ◽  
Omair Shah ◽  
Tariq Gojwari ◽  
Irfan Robbani ◽  
...  
Keyword(s):  
Knee Joint ◽  
Diagnostic Accuracy ◽  
Imaging Modality ◽  
Meniscal Tear ◽  
Clinical Findings ◽  
Ligament Injury ◽  
Effective Screening ◽  
Medial Collateral Ligament Injury ◽  
Magnetic Resonance Imaging Mri ◽  
Sensitivity Specificity

The aim is to calculate sensitivity, specificity and diagnostic accuracy of Ultrasonography (USG) as a screening modality in evaluation of Menisco- Ligamentous injuries of knee joint with Magnetic Resonance Imaging (MRI)as gold standard for comparison.Patients with clinically suspected Menisco-Ligamentous injurieswere evaluated by USG initially followed by MRI on the same day. A total of 60 patients (50 males, 10 females) underwent USG and MRI. USG was done using high frequency probe (9-14 Hz) and all the injuries noted. USG of the normal knee was done for comparison. MRI with trauma protocol sequences was done on the same day. The accuracy of USG and MRI in diagnosis of menisco-ligamentous injuries was compared. Majority of the patients (50%) belonged to age group of 21-40 years. Most common injuries seen were medial meniscal tear followed by medial collateral ligament injury. The strength of agreement between USG and MRI was good with Diagnostic accuracy of USG ranging from 83.3% to 95% for different meniscal/ligamentous injuries.USG is an effective imaging modality with high accuracy in diagnosing menisco-ligamentous injuries. USG can act as an effective screening modality in closed knee trauma for evaluation of menisco- ligamentous injuries especially in resource constrained regions owing to its easy availability, portability and lower cost. MRI can be reserved for patients with suspicious USG and clinical findings.

scholarly journals Clinical, MRI and Arthroscopic Correlation in Internal Derangement of Knee

2012 ◽  
Vol 9 (3) ◽  
pp. 174-178 ◽  
Author(s):  
U K Sharma ◽  
B K Shrestha ◽  
S Rijal ◽  
B Bijukachhe ◽  
R Barakoti ◽  
...  
Keyword(s):  
Diagnostic Accuracy ◽  
Cruciate Ligament ◽  
Meniscal Tear ◽  
Internal Derangement ◽  
Ligament Injury ◽  
Low Field ◽  
Diagnostic Arthroscopy ◽  
Medial Meniscal Tear ◽  
Low Field Mri ◽  
Sensitivity Specificity

Background The traumatic or degenerative internal derangement of the knee requires certain investigations for the establishment of diagnosis, in addition to clinical history and a thorough physical examination. The use of arthrography and arthroscopy improves the accuracy of the diagnosis. MRI scanning of the knee joint has often been regarded as the noninvasive alternative to diagnostic arthroscopy. Objective The purpose of the study was to correlate clinical and low field MRI findings with arthroscopy in internal derangement of the knee. Methods Forty one patients with suspected internal derangement of the knee were subjected to MR examination followed by arthroscopy. Clinical criteria used were history, mode of injury, Mc Murray’s, Apley’s grinding, Thessaly’s test for meniscal injury. Drawer test was considered to be essential for clinical diagnosis of cruciate ligament injury. MRI of the knee was performed in low field open magnet (0.35T, Magnetom C, Seimens). Arthroscopy was done within two months of MR examination and was considered gold standard for the internal derangement of the knee. Results The sensitivity, specificity, diagnostic accuracy of clinical examination were 96.1%, 33.3% and 73.1% respectively for medial meniscal tear; 38.4%, 96.4% and 78.1% respectively for lateral meniscal tear. The sensitivity, specificity, diagnostic accuracy of MRI were 92.3%,100% and 95.1% for medial meniscal tear; 84.6%96.4% and 92.6% respectively for lateral meniscal tear. ConclusionClinical examination showed higher sensitivity for medial meniscal tear compared to MRI, however with low specificity and diagnostic accuracy. Low field MRI showed high sensitivity, specificity, diagnostic accuracy for meniscal and cruciate ligament injury, in addition to associated derangement like articular cartilage damage, synovial thickening.DOI: http://dx.doi.org/10.3126/kumj.v9i3.6300 Kathmandu Univ Med J 2011;9(3):174-8 

Attenuation imaging as a new ultrasonographic application for identifying placental haematoma

2021 ◽  
Vol 14 (3) ◽  
pp. e239287
Author(s):  
Masahiro Yamaguchi ◽  
Takeshi Umazume ◽  
Kiwamu Noshiro ◽  
Hidemichi Watari
Keyword(s):  
Diagnostic Accuracy ◽  
Placental Abruption ◽  
Imaging Modality ◽  
Clinical Findings ◽  
Attenuation Imaging

We present a case in which attenuation imaging (ATI), a recently developed ultrasonographic application, facilitated the diagnosis of preplacental and postplacental haematoma. Placental abruption is a serious condition that affects the prognosis of infants and is difficult to diagnose. Ultrasonography is the primary imaging modality that complements the clinical findings in the diagnosis; however, its sensitivity is low, and improved diagnostic accuracy is desired. Here, we found that placental haematomas on the placental fetal surface observed at 19 weeks of gestation were indistinct from placental parenchyma in B-mode ultrasonographic imaging. In ATI, the placental parenchyma was colour-mapped, but the haematoma portion was not, which helped identify the haematoma. ATI, which also colour-maps uniform tissues, did not colour-map vessels within the placenta. ATI has a breakthrough potential for improving the diagnosis of placental abruption.

scholarly journals Diagnostic accuracy of keratoconus using anterior segment optical coherence tomography

2013 ◽  
Vol 3 (1) ◽  
pp. 2
Author(s):  
Pinakin Gunvant Davey ◽  
Christina Newman ◽  
Anna Ablamowicz ◽  
Daniel Fuller
Keyword(s):  
Optical Coherence Tomography ◽  
Diagnostic Accuracy ◽  
Corneal Thickness ◽  
Anterior Segment ◽  
Clinical Findings ◽  
Optical Coherence ◽  
Minimum Thickness ◽  
Severity Of Disease ◽  
Roc Area ◽  
Sensitivity Specificity

The aims of the present study are i) to evaluate the diagnostic accuracy of RTVue non-contact, high-resolution spectral domain optical coherence tomography (RTVue OCT) in identifying keratoconic eyes from a group of healthy eyes; and ii) to examine how the severity of disease affects diagnostic accuracy. Corneal thickness measurements were performed using the RTVue OCT on 58 eyes of 29 individuals (10 males, 19 females). Of them, 28 eyes were deemed to be keratoconic, and 30 eyes healthy on the basis of clinical findings. Sensitivity, specificity and receiver operating characteristic (ROC) area was calculated overall and by grouping eyes by severity of disease. On the whole, the ROC area was highest for the parameters minimum thickness and difference between minimum and maximum thickness of cornea (0.98). The ROC area for the parameters difference in superior nasal and inferior temporal thickness and difference in superior and inferior thickness was 0.81 and 0.77, respectively. The ROC area in identifying eyes with keratoconus varied as a function of severity of disease. From our analysis we can conclude that the RTVue OCT provides excellent diagnostic ability in identifying moderate to advanced cases of keratoconus.

Usefulness of Grey Scale and Doppler transvaginal sonography in diagnosis of ovarian torsion

2020 ◽  
Vol 14 (2) ◽  
pp. 97-102
Author(s):  
Khalid Rehman `Yousaf ◽  
Shahzad Saeed ◽  
Saman Chaudhry ◽  
Rabia Bashrat ◽  
Abadullah Khalid ◽  
...  
Keyword(s):  
Positive Predictive Value ◽  
Diagnostic Accuracy ◽  
Predictive Value ◽  
Ovarian Function ◽  
Imaging Modality ◽  
Ovarian Torsion ◽  
Transvaginal Sonography ◽  
Predictive Values ◽  
Grey Scale ◽  
Sensitivity Specificity

Background: Ovarian torsion diagnosis is a great challenge as delay in diagnosis can cause severe morbidity. Early accurate diagnosis is crucial to preserve ovarian function. Ultrasonography being the primary imaging modality plays a vital role in the evaluation of suspected ovarian torsion by helping surgeons reach the correct diagnosis, thus avoiding unnecessary intervention. This study aims to determine the diagnostic accuracy of isolated and combined sonographic features of ovarian torsion on grey scale and Doppler transvaginal ultrasonography. Patients and methods: From radiology database, from January 2016 till December 2019, sonographic signs of ovarian torsion in 113 women with suspected ovarian torsion on ultrasonography and subsequent surgical diagnosis were evaluated. Ultrasound findings were compared with surgical findings to determine the accuracy, sensitivity, specificity, and positive and negative predictive values of individual and combined ultrasound signs. Results: Diagnostic accuracy of ultrasound for ovarian torsion was 85.8%. Abnormal ovarian Doppler flow was the most accurate individual sonographic sign with accuracy, sensitivity, specificity and positive predictive value of 85.8%, 83.5%, 100% and 100% respectively followed by ovarian enlargement and ovarian edema. Combined ultrasound signs resulted in higher sensitivity and positive predictive values, and lower specificity and negative predictive values for ovarian torsion. Increasing the number of sonographic parameters increased the specificity but decreased sensitivity. High accuracy, sensitivity, positive predictive value, specificity and negative predictive value was seen when combination of three or two sonographic parameters was used as diagnostic criteria. Conclusion: Transvaginal sonography is a convenient, reliable and extremely useful imaging modality for preoperative diagnosis of ovarian torsion with high specificity, sensitivity, positive predictive value and diagnostic accuracy helping treating physicians to take prompt decisions regarding timely surgical intervention. However, due to low negative predictive values, absence of sonographic signs does not rule out ovarian torsion and high index of clinical suspicion remains of utmost importance.

MR Imaging of Medial Collateral Ligament Injury and Associated Internal Knee Joint Injury

1996 ◽  
Vol 35 (5) ◽  
pp. 799
Author(s):  
Chae Ha Lim ◽  
Sun Kyoung Lee ◽  
Dong Hun Lim ◽  
Young Sook Kim ◽  
Ju Nam Byun ◽  
...  
Keyword(s):  
Mr Imaging ◽  
Knee Joint ◽  
Medial Collateral Ligament ◽  
Ligament Injury ◽  
Collateral Ligament ◽  
Joint Injury ◽  
Medial Collateral Ligament Injury ◽  
Knee Joint Injury

Diagnostic accuracy of B-scan in predicting retinoblastoma in children, taking Magnetic Resonance Imaging of orbits as gold standard

2020 ◽  
pp. 1-7
Author(s):  
Saba Murad ◽  
Ishtiaq Ahmed ◽  
Hania Ali ◽  
Maria Ghani ◽  
Sana Murad
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Diagnostic Accuracy ◽  
Gold Standard ◽  
Radiology Department ◽  
Inclusion Criteria ◽  
Resonance Imaging ◽  
Cross Sectional ◽  
Magnetic Resonance Imaging Mri ◽  
Sensitivity Specificity

Abstract The objective of this study was to determine the diagnostic accuracy of B-scan in predicting retinoblastoma (Rb) taking Magnetic Resonance Imaging (MRI) as a gold standard. A cross-sectional validation study was conducted in the Radiology Department of Fauji Foundation Hospital from  May 20 to Nov 20, 2017. Children fulfilling the inclusion criteria were selected after informed consent and detailed history was taken for investigation of Rb. B-scan of both eyes was done using 7.5-10 MHz probe, followed by MRI of both eyes in the same patients using 1.5 Tesla MRI machine with the help of qualified MRI technicians. Data analysis was done by SPSS version 16.0. The diagnostic accuracy, sensitivity, specificity, PPV and NPV of B-scan in prediction of Rb as compared to MRI was 90.45%, 82.28%, 90.54% and 90.28% respectively. The study concluded that diagnostic accuracy of B-scan as compared to MRI is substantial in Retinoblastoma. Continuous...

The Diagnostic Accuracy of Dynamic MRI in diagnosis of complex adnexal masses

2021 ◽  
Vol 15 (7) ◽  
pp. 1646-1649
Author(s):  
Anum Awais ◽  
Saulat Sarfraz ◽  
Fatima Saleem ◽  
Sidra Sajjad ◽  
Tuba Tariq ◽  
...  
Keyword(s):  
Diagnostic Accuracy ◽  
Adnexal Mass ◽  
Dynamic Mri ◽  
Cross Sectional Study ◽  
Cross Sectional ◽  
Adnexal Masses ◽  
Mri Scans ◽  
The Mean ◽  
Magnetic Resonance Imaging Mri ◽  
Sensitivity Specificity

Background: When ultrasonographic data are restricted, magnetic resonance imaging (MRI) scans can assist identify adnexal mass features. Two European centers have done pioneering work on Dynamic MRI with varied accuracy in diagnosis of complex adnexal lesions. Aim: To evaluate diagnostic accuracy of Dynamic MRI in diagnosing complex adnexal masses, Methods: The Department of Radiology conducted a cross-sectional study. Sheikh Zayed hospital, Lahore for 6 months (September 2017-March 2018). Procedure was done for MRI and histopathology for detecting the adnexal masses. Results of MRI were compared with histopathology results, which are taken as gold standard. Reporting was done by researcher herself under supervision of consultant radiologist. SPSS version 20 was used to enter and evaluate the data. Results: The mean age of patients was 41.57±11.69 years. Dynamic MRI has a 95% sensitivity, specificity, and diagnostic accuracy. 94.37% and 94.7% respectively. Conclusion: Dynamic MRI is reliable and useful tool with high values of responsiveness, for detecting complicated indeterminate adnexal masseson Doppler considering histopathology as gold standard.Specificity and diagnostic accuracy are important. Keywords: Dynamic MRI, Histopathology, Complex Adnexal Mass

scholarly journals TFCC Injuries: Meta-Analysis and Comparison of Diagnostic Imaging Modalities

2018 ◽  
Vol 07 (03) ◽  
pp. 267-272 ◽  
Author(s):  
Matthew Treiser ◽  
Kayva Crawford ◽  
Matthew Iorio
Keyword(s):  
Magnetic Resonance ◽  
Diagnostic Accuracy ◽  
Sensitivity And Specificity ◽  
Imaging Modality ◽  
Meta Analysis ◽  
Imaging Modalities ◽  
Computed Tomographic ◽  
Pooled Data ◽  
Multiple Imaging ◽  
Magnetic Resonance Imaging Mri

Background Imaging of the triangular fibrocartilaginous complex (TFCC) remains difficult, as no single imaging modality demonstrates perfect sensitivity and specificity. Purpose This study performs a meta-analysis of multiple previous publications to guide noninvasive imaging selection for the diagnosis of TFCC injuries. Methods A literature search was performed and conducted. Studies were included that compared the diagnostic accuracy of magnetic resonance imaging (MRI), magnetic resonance arthrography (MRA), and computed tomography (CT)/computed tomographic arthrography (CTA) for the evaluation of TFCC injuries. All studies included either arthroscopic or open surgical findings as the “gold standard.” A meta-analysis was performed comparing the diagnostic accuracy of MRA, MRI, and CT for the detection of TFCC injuries. Results Initial search returned 2,568 candidate articles. Studies were then reviewed and narrowed yielding a total of 28 independent studies (20 MRI, 9 MRA, 4 CT/CTA with some studies including multiple modalities) considered in the qualitative data synthesis. Pooling of the raw data in a meta-analysis demonstrated sensitivities of 0.76 (0.72–0.80), 0.78(0.70–0.84), and 0.89 (0.81–0.95) for MRI, MRA, and CT arthrogram, respectively, with specificities of 0.82 (0.77–0.86), 0.85 (0.77–0.92), and 0.89 (0.81–0.95), respectively. Additionally, across all imaging modalities, diagnostic accuracy was highest for central TFCC lesions versus peripheral lesions. Conclusion This study represents the largest meta-analysis to date to compare multiple imaging modalities for the diagnosis of TFCC injuries. Pooled data demonstrated that CTA and MRA had statistically equivalent sensitivity and specificity for the diagnosis of TFCC injuries. Diagnostic accuracy was highest for central TFCC injuries.

scholarly journals Radiological Imaging for Assessing the Respectability of Hilar Cholangiocarcinoma: A Systematic Review and Meta-Analysis

2015 ◽  
Vol 2015 ◽  
pp. 1-11 ◽  
Author(s):  
Hongchen Zhang ◽  
Jian Zhu ◽  
Fayong Ke ◽  
Mingzhe Weng ◽  
Xiangsong Wu ◽  
...  
Keyword(s):  
Predictive Value ◽  
Hilar Cholangiocarcinoma ◽  
Imaging Modality ◽  
Meta Analysis ◽  
Area Under The Curve ◽  
Diagnostic Efficiency ◽  
Positron Emission ◽  
Pet Ct ◽  
Magnetic Resonance Imaging Mri ◽  
Sensitivity Specificity

Hilar cholangiocarcinoma (HCC) remains one of the most difficult tumors to stage and treat. The aim of the study was to assess the diagnostic efficiency of computed tomography (CT), magnetic resonance imaging (MRI), and positron emission tomography/computer tomography (PET/CT) in evaluating the resectability of HCC. A systematic search was performed of the PubMed, EMBASE, and Cochrane databases. Sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV), and diagnostic accuracy were calculated for individual studies and pooled data as well as test for heterogeneity and public bias. Our data showed that CT had the highest pooled sensitivity at 95% (95% CI: 91–97), whereas PET/CT had the highest pooled specificity at 81% (95% CI: 69–90). The area under the curve (AUC) of CT, MRI, and PET/CT was 0.9269, 0.9194, and 0.9218, respectively. In conclusion, CT is the most frequently used imaging modality to assess HCC resectability with a good sensitivity and specificity. MRI was generally comparable with that of CT and can be used as an alternative imaging technique. PET/CT appears to be the best technique in detecting lymph node and distant metastasis in HCC but has no clear role in helping to evaluate issues of local resectability.

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