Diffusion-Weighted Imaging of Periventricular Leukomalacia in Very Young Children: Assessment of Peritrigonal Stripe of Restricted Diffusion

2016 ◽  
Vol 48 (02) ◽  
pp. 086-090
Author(s):  
Ping-Sheng Lu ◽  
Cheng-Hong Toh ◽  
Chih-Hua Yeh ◽  
Huei-Shyong Wang ◽  
Kuang-Lin Lin ◽  
...  
Keyword(s):  
Young Children ◽  
Diffusion Weighted Imaging ◽  
Periventricular Leukomalacia ◽  
Restricted Diffusion ◽  
Very Young Children ◽  
Diffusion Weighted

LIMITATIONS OF DIFFUSION-WEIGHTED IMAGING IN THE DIAGNOSIS OF POSTOPERATIVE INFECTIONS

Neurosurgery ◽  
2008 ◽  
Vol 62 (3) ◽  
pp. 577-583 ◽  
Author(s):  
Christopher J. Farrell ◽  
Brian L. Hoh ◽  
Mary L. Pisculli ◽  
John W. Henson ◽  
Fred G. Barker ◽  
...  
Keyword(s):  
False Positive ◽  
Diffusion Weighted Imaging ◽  
Postoperative Infection ◽  
False Negative ◽  
False Negative Rate ◽  
Restricted Diffusion ◽  
Postoperative Infections ◽  
Negative Rate ◽  
Diffusion Weighted ◽  
Diagnosis Of Infection

Abstract OBJECTIVE Diffusion-weighted imaging (DWI) has assumed a rapidly emerging role in the diagnosis of intracranial infection; however, its usefulness in the recognition of postoperative infection has been largely unexplored. We sought to determine the ability of DWI to accurately detect a broad range of postneurosurgical infections as well as identify individual factors that may limit its applicability. METHODS We retrospectively identified 65 patients who had undergone surgery for the confirmed diagnosis of infection between August 2001 and February 2005 and had received preoperative magnetic resonance imaging evaluation, including DWI. Fifty patients developed infections after a primary neurosurgical procedure (“postoperative” infections), whereas 15 infections occurred without antecedent intervention (“spontaneous” infections). Logistic regression analysis was used to identify factors associated with false-negative DWI findings. Additionally, we investigated the false-positive rate of DWI by retrospectively reviewing a series of 30 consecutive patients who underwent craniotomy and received postoperative DWI. RESULTS Spontaneously developing cranial infections exhibited evidence of restricted diffusion in 14 out of 15 (93%) patients; however, infections that occurred postoperatively were associated with a significant false-negative rate using DWI (36%; P < 0.01). Within the subset of patients with postoperative infection, location of infection significantly correlated with the DWI false-negative rate. Infections located extradurally were less likely to demonstrate restricted diffusion compared with those located primarily within the subdural or intraparenchymal spaces. Additionally, false-positive DWI findings were observed in 11 of the 30 patients (37%) who had DWI obtained postoperatively in the absence of infection. CONCLUSION Utilization of DWI for the diagnosis of infection after primary neurosurgical intervention is associated with an elevated false-negative rate. The absence of restricted diffusion is not sufficient to exclude the presence of pyogenic postcraniotomy infection and should not be used as the principle determinant of patient management in this clinical setting.

Diffusion-weighted imaging in hemorrhagic abdominal and pelvic lesions: restricted diffusion can mimic malignancy

2017 ◽  
Vol 43 (7) ◽  
pp. 1772-1784 ◽  
Author(s):  
Chandana Lall ◽  
Vlad Bura ◽  
Thomas K. Lee ◽  
Priya Bhosale ◽  
Silvana C. Faria ◽  
...  
Keyword(s):  
Diffusion Weighted Imaging ◽  
Restricted Diffusion ◽  
Diffusion Weighted ◽  
Pelvic Lesions

Hypoxic-Ischemic Injury Complicates Inflicted and Accidental Traumatic Brain Injury in Young Children: The Role of Diffusion-Weighted Imaging

2007 ◽  
Vol 24 (1) ◽  
pp. 106-118 ◽  
Author(s):  
Rebecca N. Ichord ◽  
Maryam Naim ◽  
Avrum N. Pollock ◽  
Michael L. Nance ◽  
Susan S. Margulies ◽  
...  
Keyword(s):  
Traumatic Brain Injury ◽  
Brain Injury ◽  
Young Children ◽  
Diffusion Weighted Imaging ◽  
Ischemic Injury ◽  
Diffusion Weighted ◽  
Hypoxic Ischemic Injury

scholarly journals All that glitters are not gold: holds true in female adnexal lesions

2021 ◽  
Vol 52 (1) ◽  
Author(s):  
Mohamed Rafi Kathar Hussain ◽  
N. Kulasekeran ◽  
A. M. Anand ◽  
Rajasree Dhinadhyalan
Keyword(s):  
Diffusion Weighted Imaging ◽  
Adnexal Mass ◽  
Malignant Lesion ◽  
Malignant Neoplasm ◽  
Restricted Diffusion ◽  
Water Molecules ◽  
Main Body ◽  
Diffusion Weighted ◽  
True Knowledge ◽  
Mass Lesions

Abstract Background Adnexal mass lesions are commonly encountered pathologies that creates diagnostic challenges for radiologist. Diffusion weighted imaging is a vital tool in the radiologist armamentarium for improving the diagnostic accuracy of adnexal lesions other than routine spine echo sequences. Main body Functional information about the lesion regarding the mobility of the water molecules in its tissue is assessed by diffusion weighted imaging. In addition to the solid malignant neoplasm, normal blood, fat, necrosis and pus also shows restricted diffusion. Conclusion All the lesion that shows restriction in the DWI are not malignant, but converse is mostly true. Knowledge regarding the non-malignant lesion in the ovary that shows restricted diffusion will give a clue in diagnosis, management and treatment of the adnexal lesions.

scholarly journals P.122 Restricted diffusion of white matter in infants with subdural hematoma

2016 ◽  
Vol 43 (S2) ◽  
pp. S48-S48
Author(s):  
CA Elliott ◽  
V Mehta ◽  
V Ramaswamy
Keyword(s):  
Traumatic Brain Injury ◽  
Brain Injury ◽  
White Matter ◽  
Diffusion Weighted Imaging ◽  
White Matter Injury ◽  
Restricted Diffusion ◽  
Cortical Atrophy ◽  
Diffusion Restriction ◽  
Subdural Hematomas ◽  
Diffusion Weighted

Background: Inflicted head injury is a major cause of infant morbidity and mortality. The extent of traumatic brain injury in infants is often best characterized by diffusion weighted magnetic resonance imaging. In this cases series we describe four infants aged 6-19 months, with small unilateral subdural hematomas secondary to abusive head trauma accompanied by extensive areas of restricted diffusion weighted imaging isolated to the cerebral white matter. Methods: Retrospective, single-centre case series of four children with small unilateral subdural hematomas with early and delayed MR imaging with diffusion weighted imaging. Results: In three cases there was acute diffusion restriction ispilateral to the subdural, while in one case diffusion restriction was present bilaterally. All patients had multiple seizures and bilateral multilayered retinal hemorrhages. After non-surgical treatment, all patients survived albeit with significant motor and cognitive deficits and significant cortical atrophy on long-term followup imaging. Conclusions: These four cases highlight that relatively small subdural hematomas following child abuse can manifest with extensive white matter injury only evident at early stages with diffusion weighted imaging. We propose that selective white matter injury as a result of either reperfusion or axonal degeneration in response to the initial insult accounts for this novel pattern of infantile traumatic brain injury.

scholarly journals Benign ovarian lesions with restricted diffusion

2019 ◽  
Vol 52 (2) ◽  
pp. 106-111 ◽  
Author(s):  
Lisa Agostinho ◽  
Mariana Horta ◽  
João Cunha Salvador ◽  
Teresa Margarida Cunha
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Diffusion Weighted Imaging ◽  
Diagnostic Value ◽  
Restricted Diffusion ◽  
Special Focus ◽  
Resonance Imaging ◽  
Female Pelvis ◽  
Stromal Tumors ◽  
Diffusion Weighted

Abstract Developments in magnetic resonance imaging have expanded its role in the assessment of the female pelvis, including the diagnosis of ovarian lesions. In this setting, diffusion-weighted imaging has proven its diagnostic value, which is particularly important in differentiating between benign and malignant ovarian tumors. In general, the latter show restricted diffusion, whereas the former do not. Exceptions include teratomas, endometriomas, hemorrhagic cysts, ovarian abscesses, ovarian infarction, and some benign stromal tumors. The aim of this review is to draw attention to benign ovarian lesions with restricted diffusion, with a special focus on diffusion-weighted imaging pearls and pitfalls.

scholarly journals Hemorrhage in the Wall of Pyogenic Brain Abscess on Susceptibility Weighted MR Sequence: A Report of 3 Cases

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
Krishnamoorthy Thamburaj ◽  
Amit K. Agarwal ◽  
Shyamsunder B. Sabat ◽  
Dan T. Nguyen
Keyword(s):  
Brain Abscess ◽  
Diffusion Weighted Imaging ◽  
Stereotactic Biopsy ◽  
Restricted Diffusion ◽  
Susceptibility Weighted Imaging ◽  
3T Mri ◽  
Weighted Sequence ◽  
Diffusion Weighted ◽  
Pyogenic Abscess

Background and Purpose. In pyogenic brain abscess, hemorrhage in the walls is considered exceptional. Recently, hemorrhagic changes in the walls of pyogenic abscess have been demonstrated on susceptibility weighted imaging with 3T MRI. Here, we report hemorrhagic changes in the walls of pyogenic brain abscess on susceptibility weighted imaging with 1.5T MRI.Method. MRI of brain was done using 1.5T MRI with diffusion weighted sequence, susceptibility weighted sequence, and other standard sequences in 3 consecutive cases of pyogenic brain abscess. Stereotactic biopsy and cultures were obtained in 2 cases. One case was treated empirically with antibiotics.Results. Susceptibility sequence demonstrated hemorrhage in the wall of brain abscess in all three cases. All three cases also demonstrated restricted diffusion on diffusion weighted imaging.Conclusion. Susceptibility weighted imaging can demonstrate hemorrhagic changes in the walls of pyogenic brain abscess on 1.5T MRI. Presence of hemorrhage in the walls of ring enhancing lesions should not automatically lead to a diagnosis of tumor.

Sign in / Sign up

Export Citation Format

Share Document