Diagnostic value of susceptibility-weighted imaging for endometrioma: preliminary results from a retrospective analysis

2021 ◽  
pp. 028418512110224
Author(s):  
Hong Chen ◽  
Guoliang Wang ◽  
Xuexue Wang ◽  
Yan Gao ◽  
Junhua Liang ◽  
...  
Keyword(s):  
Cyst Wall ◽  
Preoperative Diagnosis ◽  
Final Analysis ◽  
Diagnostic Value ◽  
Susceptibility Weighted Imaging ◽  
Hemorrhagic Disease ◽  
Presenting Symptoms ◽  
Clinical Diagnoses ◽  
Magnetic Resonance Imaging Mri ◽  
Age Range

Background Endometrioma is a common manifestation of endometriosis that can be difficult to diagnose with conventional magnetic resonance imaging (MRI). Susceptibility-weighted imaging (SWI) may be more sensitive than conventional MRI in the detection of chronic, local hemorrhagic disease. Purpose To investigate whether signal voids in SWI sequences could be used in the preoperative diagnosis of endometrioma. Material and Methods This retrospective study included consecutive female patients with clinically suspected endometrioma. All patients underwent pelvic 3-T MRI (T1- and T2-weighted) and SWI within two weeks before laparoscopy. Two experienced radiologists blinded to the histopathologic/clinical diagnoses interpreted the images together, and any disagreements were resolved by consensus. Results The final analysis included 73 patients: 46 patients (mean age=37 years; age range=22–68 years) with 85 endometrioma lesions and 27 patients (mean age=34 years; age range=15–68 years) with 34 non-endometrioid cystic lesions (18 hemorrhagic corpus luteal cysts, three simple cysts, three mucinous cystadenomas, two mature teratomas, and one endometrioid cyst with corpus luteum rupture/hemorrhage). The presenting symptoms for patients with endometrioma were chronic pelvic pain (44.6%), dysmenorrhea (31.9%), infertility (12.8%), dyspareunia (6.4%), and menstrual irregularity (4.3%). MRI identified all 119 lesions observed laparoscopically. SWI visualized punctate or curvilinear signal voids along the cyst wall or within the lesion in 67 of 85 endometriomas (78.8%) and only 3 of 31 non-endometrioid cysts (8.8%). Conclusion The use of SWI to look for signal voids in the cyst wall or within the lesion could facilitate the preoperative diagnosis of endometrioma.

Abstract W P419: Correlation of Quantitative Susceptibility Mapping in Cerebral Cavernous Malformations with Clinical Features

Stroke ◽  
2015 ◽  
Vol 46 (suppl_1) ◽  
Author(s):  
Huan Tan ◽  
Abdul Ghani Mikati ◽  
Lingjiao Zhang ◽  
Tian Liu ◽  
Yi Wang ◽  
...  
Keyword(s):  
Final Analysis ◽  
Time Frame ◽  
Susceptibility Mapping ◽  
Iron Deposition ◽  
Quantitative Susceptibility Mapping ◽  
Cross Sectional ◽  
Cavernous Malformations ◽  
Magnetic Resonance Imaging Mri ◽  
Short Time ◽  
Age Range

Quantitative susceptibility mapping (QSM) is a novel noninvasive magnetic resonance imaging (MRI) technique that was shown to accurately quantify the iron content in cerebral cavernous malformation (CCM) lesions. In this study, we aimed to correlate the baseline characteristics of CCM patients and their clinical activities with QSM measurements. Methods: a total of 65 patients (mean age: 39, age range: 3 - 76, 16 male, 49 female, 27 sporadic, 38 familial) were included. Imaging was performed on 3T systems. Lesions from all sporadic cases were included in the final analysis. In familial cases, only lesions identified on T2 weighted images and have maximum cross-sectional diameter greater than 5mm were included. A total of 241 lesions were analyzed. Results: Pearson’s correlation revealed that patient age at scan was positively correlated with the mean lesional susceptibility per patient (p<0.05, Figure 1a). Mean susceptibility for lesions with prior bleeding history was significantly higher than lesions without (p<0.05, Figure 1b). Longitudinal changes in lesional susceptibility were small in a short term (<14 months) in patients who were clinically stable (Figure 1c). In addition, a mixture of susceptibility levels was observed in different lesional blood byproduct depositions, as determined by contrast on the conventional MRIs (Figure 1d). Conclusions: Our prelimiary data suggested that: 1) lesions with longer duration harbor more iron; 2) lesions with prior bleeds harbor more iron deposition; 3) there are little changes in lesional iron deposition in patients who are clinically stable in a short time frame. In sum, QSM offered additional insights into the natural progression of the CCM disease in terms of the accumulation of lesional iron deposition.

Epidemiology of coronary abnormalities of discharge and branching and their clinical significance

2019 ◽  
Vol 22 (6) ◽  
pp. 40-50
Author(s):  
E. F. Abbasov ◽  
S. S. Manafov ◽  
F. Z. Abdullayev ◽  
F. E. Abbasov ◽  
A. G. Akhundova
Keyword(s):  
Coronary Artery ◽  
Coronary Angiography ◽  
World Literature ◽  
Incidence Rates ◽  
Coronary Anomalies ◽  
Coronary Artery Anomalies ◽  
Coronary Abnormalities ◽  
Magnetic Resonance Imaging Mri ◽  
Age Range ◽  
Living Person

Purpose.Until the mid-20th century they could be discovered only during autopsy, it means after death. With the introduction of coronary angiography it become possible to find them in a living person. Later on, new modalities such as computed tomography (CT) and magnetic resonance imaging (MRI) enhanced futher our abilities. It is very important to discover coronary anomalies in a living person, because some of them could lead to sudden cardiac death (SCD). In fact, coronary artery anomalies are the second main cause of the SCD in young athletes. Another importance is driven by the fact, that some of them could lead to lifethreatening complications during cardiac surgery when unknown before the operation.Methods.We prospectively reviewed all coronary angiography films from 2011 to 2016 in our center. Coronary anomalies were reviewed and classified by two independent experienced operators. Patients with congenital heart disease and coronary fistulas were excluded.Results.Out of 5055 patients 148 (2.9%) had coronary artery anomalies of origin and distribution. Those were 120 men (81.1%) and 28 women (18.9%) with an age range between 29 to 88 years. The three most common anomalies were myocardial bridge (48.7%), separate origin of the conus branch (13.5%) and separate origin of the LAD and LCX (8.1%).Conclusion.In our study we found more or less the same types and incidence rates of coronary artery anomalies as in the world literature. We had apparently higher rates of myocardial bridges, compared to average number on angiography studies, but very close to authopsy study rates.

scholarly journals A multicenter, hospital-based and non-inferiority study for diagnostic efficacy of automated whole breast ultrasound for breast cancer in China

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Yujing Xin ◽  
Xinyuan Zhang ◽  
Yi Yang ◽  
Yi Chen ◽  
Yanan Wang ◽  
...  
Keyword(s):  
Breast Cancer ◽  
False Negative ◽  
Final Analysis ◽  
Age Group ◽  
Surgical Biopsy ◽  
True Negative ◽  
Diagnostic Efficacy ◽  
Negative Results ◽  
Informed Consent Form ◽  
Magnetic Resonance Imaging Mri

AbstractThis study is the first multi-center non-inferiority study that aims to critically evaluate the effectiveness of HHUS/ABUS in China breast cancer detection. This was a multicenter hospital-based study. Five hospitals participated in this study. Women (30–69 years old) with defined criteria were invited for breast examination by HHUS, ABUS or/and mammography. For BI-RADS category 3, an additional magnetic resonance imaging (MRI) test was provided to distinguish the true negative results from false negative results. For women classified as BI-RADS category 4 or 5, either core aspiration biopsy or surgical biopsy was done to confirm the diagnosis. Between February 2016 and March 2017, 2844 women signed the informed consent form, and 1947 of them involved in final analysis (680 were 30 to 39 years old, 1267 were 40 to 69 years old).For all participants, ABUS sensitivity (91.81%) compared with HHUS sensitivity (94.70%) with non-inferior Z tests, P = 0.015. In the 40–69 age group, non-inferior Z tests showed that ABUS sensitivity (93.01%) was non-inferior to MG sensitivity (86.02%) with P < 0.001 and HHUS sensitivity (95.44%) was non-inferior to MG sensitivity (86.02%) with P < 0.001. Sensitivity of ABUS and HHUS are all superior to that of MG with P < 0.001 by superior test.For all participants, ABUS specificity (92.89%) was non-inferior to HHUS specificity (89.36%) with P < 0.001. Superiority test show that specificity of ABUS was superior to that of HHUS with P < 0.001. In the 40–69 age group, ABUS specificity (92.86%) was non-inferior to MG specificity (91.68%) with P < 0.001 and HHUS specificity (89.55%) was non-inferior to MG specificity (91.68%) with P < 0.001. ABUS is not superior to MG with P = 0.114 by superior test. The sensitivity of ABUS/HHUS is superior to that of MG. The specificity of ABUS/HHUS is non-inferior to that of MG. In China, for an experienced US radiologist, both HHUS and ABUS have better diagnostic efficacy than MG in symptomatic individuals.

scholarly journals Juxtacortical susceptibility changes in progressive multifocal leukoencephalopathy at the gray–white matter junction correlates with iron-enriched macrophages

2021 ◽  
pp. 135245852199965
Author(s):  
Kedar R Mahajan ◽  
Moein Amin ◽  
Matthew Poturalski ◽  
Jonathan Lee ◽  
Danielle Herman ◽  
...  
Keyword(s):  
White Matter ◽  
Progressive Multifocal Leukoencephalopathy ◽  
Central Nervous System Lymphoma ◽  
Susceptibility Weighted Imaging ◽  
Resonance Imaging ◽  
Gradient Echo ◽  
Total N ◽  
Mri Brain ◽  
Fluid Attenuated Inversion Recovery ◽  
Magnetic Resonance Imaging Mri

Objective: Describe magnetic resonance imaging (MRI) susceptibility changes in progressive multifocal leukoencephalopathy (PML) and identify neuropathological correlates. Methods: PML cases and matched controls with primary central nervous system lymphoma (PCNSL) were retrospectively identified. MRI brain at 3 T and 7 T were reviewed. MRI-pathology correlations in fixed brain autopsy tissue were conducted in three subjects with confirmed PML. Results: With PML ( n = 26 total, n = 5 multiple sclerosis natalizumab-associated), juxtacortical changes on susceptibility-weighted imaging (SWI) or gradient echo (GRE) sequences were noted in 3/3 cases on 7 T MRI and 14/22 cases (63.6%) on 1.5 T or 8/22 (36.4%) 3 T MRI. Similar findings were only noted in 3/25 (12.0%) of PCNSL patients (odds ratio (OR) 12.83, 95% confidence interval (CI), 2.9–56.7, p < 0.001) on 1.5 or 3 T MRI. On susceptibility sequences available prior to diagnosis of PML, 7 (87.5%) had changes present on average 2.7 ± 1.8 months (mean ± SD) prior to diagnosis. Postmortem 7 T MRI showed SWI changes corresponded to areas of increased iron density along the gray–white matter (GM-WM) junction predominantly in macrophages. Conclusion: Susceptibility changes in PML along the GM-WM junction can precede noticeable fluid-attenuated inversion recovery (FLAIR) changes and correlates with iron accumulation in macrophages.

The Diagnostic Value of MRI in Traumatic Brachial Plexus Injury

1994 ◽  
Vol 19 (1) ◽  
pp. 55-59 ◽  
Author(s):  
M. OCHI ◽  
Y. IKUTA ◽  
M. WATANABE ◽  
K. KIMOR ◽  
K. ITOH
Keyword(s):  
Brachial Plexus ◽  
Nerve Root ◽  
Brachial Plexus Injury ◽  
Diagnostic Value ◽  
Resonance Imaging ◽  
Nerve Roots ◽  
Surgical Exploration ◽  
Nerve Root Avulsion ◽  
Magnetic Resonance Imaging Mri ◽  
The Individual

Findings in 34 patients with traumatic brachial plexus injury documented by surgical exploration and intra-operative somatosensory-evoked potentials were correlated with findings on myelography and magnetic resonance imaging (MRI) to determine whether MRI can identify nerve root avulsion. The coronal and sagittal planes were not able to demonstrate avulsion of the individual nerve roots. The axial and axial oblique planes did provide useful information to determine which nerve root was avulsed in the upper plexus, although it was difficult to clearly delineate the lower cervical rootlets. The accuracy of MRI was 73% for C5 and 64% for C6 and that of myelograpby 63% for C5 and 64% for C6. Thus, the diagnostic accuracy of MRI for upper nerve roots was slightly superior to myelography. Although its primary diagnostic value is limited to the upper nerve roots whose avulsion is relatively difficult to diagnose by myelography, MRI can provide useful guidance in the waiting period prior to surgical exploration after brachial plexus injury.

Increased muscle fiber fractional anisotropy value using diffusion tensor imaging after compression without fiber injury

2021 ◽  
pp. 028418512110582
Author(s):  
Takumi Yokohama ◽  
Motoyuki Iwasaki ◽  
Daisuke Oura ◽  
Sho Furuya ◽  
Yoshimasa Niiya
Keyword(s):  
Diffusion Tensor Imaging ◽  
Fractional Anisotropy ◽  
Muscle Tissue ◽  
Diffusion Tensor ◽  
Longitudinal Direction ◽  
Diffusion Parameters ◽  
Apparent Diffusion ◽  
The Mean ◽  
Magnetic Resonance Imaging Mri ◽  
Age Range

Background Recent studies have indicated that injuries such as muscle tears modify the microstructural integrity of muscle, leading to substantial alterations in measured diffusion parameters. Therefore, the fractional anisotropy (FA) value decreases. However, we hypothesized that soft tissue, such as muscle tissue, undergoes reversible changes under conditions of compression without fiber injury. Purpose To evaluate the FA change due to compression in muscle tissue without fiber injury. Material and Methods Diffusion tensor imaging (DTI) was performed on both feet of 10 healthy volunteers (mean age = 35.0 ± 10.39 years; age range = 23–52 years) using a 3.0-T magnetic resonance imaging (MRI) scanner with an eight-channel phased array knee coil. An MRI-compatible sphygmomanometer was applied to the individuals’ lower legs and individuals were placed in a compressed state. Then, rest intervals of 5 min were set in re-rest state after compression. The FA value, apparent diffusion coefficient (ADC), and eigenvalues (λ1, λ2, λ3) of the gastrocnemius and soleus muscle were measured at each state. Results The mean FA values increased in all muscles in a compressed state, while the mean λ3 decreased. In all muscles, significant differences were found between the rest and compressed states in terms of mean FA and λ3 ( P < 0.0001). Conclusion We confirmed the reversibility of the DTI metrics, which suggests that there was no muscle injury during this study. In cases of compression without fiber injury, the FA value increases, because fibers are strongly aligned in the longitudinal direction.

scholarly journals Diffusion-weighted magnetic resonance imaging in cystic renal masses

2017 ◽  
Vol 11 (1-2) ◽  
pp. 8 ◽  
Author(s):  
Fikret Balyemez ◽  
Ahmet Aslan ◽  
Ibrahim Inan ◽  
Ercan Ayaz ◽  
Vildan Karagöz ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Renal Cysts ◽  
Diagnostic Value ◽  
Resonance Imaging ◽  
Mri Findings ◽  
Renal Masses ◽  
Adc Value ◽  
Diffusion Weighted ◽  
Magnetic Resonance Imaging Mri

Introduction: We aimed to introduce the diagnostic value of diffusion-weighted (DWI) magnetic resonance imaging (MRI) for distinguishing benign and malignant renal cystic masses.Methods: Abdominal DWI-MRIs of patients with Bosniak categories 2F, 3, and 4 cystic renal masses were evaluated retrospectively. Cystic masses were assigned as benign or malignant according to histopathological or followup MRI findings and compared with apparent diffusion coefficient (ADC) values.Results: There were 30 patients (18 males and 12 females, mean age was 59.23 ± 12.08 years [range 38‒83 years]) with cystic renal masses (eight Bosniak category 2F, 12 Bosniak category 3, 10 Bosniak category 4). Among them, 14 cysts were diagnosed as benign and 16 as malignant by followup imaging or histopathological findings. For the malignant lesions, the mean ADC values were lower than for benign lesions (p=0.001). An ADC value of ≤2.28 x10-6 mm2/s or less had a sensitivity of 75% and a specificity of 92.86% for detecting malignancy.Conclusions: ADC can improve the diagnostic performance of MRI in the evaluation of complex renal cysts when used together with conventional MRI sequences.

scholarly journals False diagnosis of and needless therapy for presumed gestational trophoblastic disease in women with an unusual site of residual pregnancy

2018 ◽  
Vol 47 (2) ◽  
pp. 673-681 ◽  
Author(s):  
Tong Gao ◽  
Mingming Sun ◽  
Liangqing Yao ◽  
Wei Jiang
Keyword(s):  
Clinical Manifestations ◽  
Diagnostic Value ◽  
Gestational Trophoblastic Disease ◽  
High Serum ◽  
Resonance Imaging ◽  
Unusual Site ◽  
Pelvic Mri ◽  
Trophoblastic Disease ◽  
False Diagnosis ◽  
Magnetic Resonance Imaging Mri

Objective This study aimed to determine the diagnostic value of magnetic resonance imaging (MRI), hysteroscopy, and laparoscopy to avoid unnecessary treatment when patients present with clinical manifestations that are close to those of gestational trophoblastic neoplasia (GTN). Methods Three patients who were falsely diagnosed with presumed GTN and received needless chemotherapy in our hospital from July 2011 to March 2012 were studied. We also reviewed data of patients with similar clinical features who were diagnosed as having residual pregnancy in recent years. Clinical manifestations were evaluated. Results All three patients had persistently high serum β-human chorionic gonadotrophin levels and a mass with abundant blood supply in the uterus after termination of pregnancy. The patients were diagnosed with GTN and underwent chemotherapy. They responded poorly to chemotherapy and underwent surgery. The pathological diagnosis in all patients was residual pregnancy. In recent years, no patients were misdiagnosed because pelvic MRI, hysteroscopy, or laparoscopy was used when residual pregnancy could not be excluded. Conclusion Gynecologists should diagnose carefully when patients present with clinical manifestations that are close to those of GTN to avoid unnecessary treatment. MRI, hysteroscopy, and laparoscopy could be important examinations for excluding residual pregnancy.

scholarly journals Imaging of larynx: Diagnostic value of computed tomography and magnetic resonance imaging

2009 ◽  
Vol 56 (3) ◽  
pp. 39-44
Author(s):  
R.M. Maksimovic ◽  
B.A. Banko ◽  
J.P. Milovanovic
Keyword(s):  
Magnetic Resonance Imaging ◽  
Computed Tomography ◽  
Magnetic Resonance ◽  
Regional Lymph Node ◽  
Diagnostic Value ◽  
Resonance Imaging ◽  
Precise Diagnosis ◽  
Node Metastases ◽  
Magnetic Resonance Imaging Mri

Computed tomography (CT) and magnetic resonance imaging (MRI) are enabling more precise diagnosis and treatment planning in patients with diseases of the larynx. The aim of this article is to describe the role of these methods in assessment of the laringeal diseases and key local anatomic characteristics important for spread of the disease. CT and MRI have a valuable contribution to the staging of the tumors due to the possibility to show the relationship to the ventricular complex, involvement of the subumucosal spaces, defining craniocaudal and anterposterior extension, laringeal cartilage invasion, as well as regional lymph node metastases.

Sign in / Sign up

Export Citation Format

Share Document