Edwards Emily,  Lee Marsha,  Phelps Andrew,  Kim Jane,  Courtier Jesse

Final Pr. ID: Poster #: EDU-090

Evaluation of pediatric abdominal vasculature is typically performed with contrast enhanced cross-sectional imaging or catheter angiography. Concern over radiation exposure and the safety of intravenous contrast agents in patients with impaired renal function has led to increased interest in non-contrast MR angiography. Recent advances in MRI pulse sequence design now allow for non-invasive high resolution imaging of pediatric abdominal vasculature without the use of radiation or intravenous contrast. Read More

Authors:  Edwards Emily , Lee Marsha , Phelps Andrew , Kim Jane , Courtier Jesse

Keywords:  MRA, vasculature, Technique

Leelakanok Nattinee,  Zapala Matthew,  Edwards Emily,  Phelps Andrew,  Mackenzie John,  Courtier Jesse

Final Pr. ID: Poster #: SCI-018

Abdominal Magnetic Resonance Angiography (MRA) has gained favor in pediatric patients due to its lack of ionizing radiation and noninvasive nature. Reports exist regarding incidental findings on body MRA in adult patients. However, the incidental findings in pediatric abdominal MRA have not been previously reported. Our study aims to determine the frequencies, characteristics and categories of incidental findings in pediatric patients undergoing abdominal MRA. Read More

Authors:  Leelakanok Nattinee , Zapala Matthew , Edwards Emily , Phelps Andrew , Mackenzie John , Courtier Jesse

Keywords:  MRA, Pediatric, MRI

Qu Feifei,  Qian Zhaoxia,  Yadav Brijesh,  Romero Roberto,  Haacke E.,  Sun Taotao,  Patwardhan Sanjay,  Patwardhan Manasi,  Jaiman Sunil,  Jellal Pavan,  Mody Swati,  Marin Concha Julio,  Jiang Ling

Final Pr. ID: Paper #: 106

Both placental vascular density and oxygenation can indicate placenta health. MRA is a powerful tool to evaluate tissue vasculature but with limited applications because of the use of contrast agents. T₂* maps can be used to estimate the placental oxygen reserve. In this work, we acquired non-contrast enhanced MRA and T₂* maps to evaluate placental vasculature and oxygenation. Read More

Authors:  Qu Feifei , Qian Zhaoxia , Yadav Brijesh , Romero Roberto , Haacke E. , Sun Taotao , Patwardhan Sanjay , Patwardhan Manasi , Jaiman Sunil , Jellal Pavan , Mody Swati , Marin Concha Julio , Jiang Ling

Keywords:  Placenta, MRA, T2* mapping

Snyder Elizabeth,  Puttgen Kate,  Mitchell Sally,  Tekes-brady Aylin

Final Pr. ID: Poster #: EDU-073

Vascular anomalies comprise both vascular tumors and vascular malformations which can occur anywhere in the body; the trunk and extremities being the second most common location following the head and neck. Accurate identification of these anomalies is important for proper clinical evaluation and management, particularly since these patients often require multidisciplinary care. The International Society for the Study of Vascular Anomalies (ISSVA) classification, recently updated in 2014, is widely accepted and offers comprehensive classification for all medical subspecialties involved in the care of these complex anomalies, thus providing common language among caregivers. The purpose of this educational exhibit is to highlight the most important MRI and MRA imaging findings in order to identify these lesions according to the 2014 ISSVA classification. Read More

Authors:  Snyder Elizabeth , Puttgen Kate , Mitchell Sally , Tekes-brady Aylin

Keywords:  vascular anomalies, MRI/MRA, time-resolved MRA

Infante Juan

Final Pr. ID: Poster #: CR-002

INTRODUCTION
Renal artery stenosis is a common complication after transplantation. In our institution, we have unfortunately found a high rate of false-positive Doppler ultrasound and non-contrast time-of-flight MRA studies that go to invasive catheterization which turn out negative for renal artery stenosis. We present one of many of our cases which show the utility of high-quality 3D MRA using another non-contrast technique, NATIVE True-FISP, which is appears better apt at achieving adequate signal even when the acquisition plane is not perpendicular to the vessel of interest.

CASE DESCRIPTION
A 13-year-old male with a history of idiopathic dilated cardiomyopathy and end-stage renal disease from presumed ischemic injury during cardiac catheterization underwent a combined cardiac transplant and deceased donor kidney transplant. Two months after the transplant, the patient was admitted for respiratory distress, pulmonary edema, and worsening cardiac function, the latter documented by routine outpatient echocardiography.

On admission, a Doppler ultrasound showed elevated peak systolic velocity of the transplant renal artery anastomosis, up to 434 cm/sec. To confirm the sonographic suspicion of renal artery stenosis, a non-contrast 3D MRA was requested which showed tight juxta-anastomic stenosis (see Figure 1).

The interventional radiology service was consulted who brought the patient to their angiography suite on the basis of the clinical and imaging findings. A diagnostic angiogram confirmed the pre-angiographic imaging findings with nearly one-to-one correlation with the MR 3D-volume-rendered images (see Figure 2). Angioplasty of this lesion was performed, and follow-up ultrasounds up to six-months post angioplasty show interval normalization of the renal artery velocities and blood pressure. Read More

Authors:  Infante Juan

Keywords:  MRA, Non-contrast, NATIVE

Mehlman Tracey,  Riley, Jr. Pat,  Person Allison

Final Pr. ID: Poster #: SCI-042

Hip pain in the active adolescent can be a diagnostic challenge. Labral tears are a common cause of pain, but on average, a lag time of greater than 2 years exists before a diagnosis is achieved. Leading etiologies of labral pathology include: trauma, femoroacetabular impingement, and dysplasia. A better understanding of hip pathology, in this age group and the development of less-invasive hip arthroscopy and surgical repair, has led to an increased number of pediatric MR hip arthrograms (MRA) being performed.

The purpose of this investigation was to evaluate the accuracy of our MRA reports with arthroscopic findings and create a pictorial radiologic-arthroscopic correlation. This study will assist both radiologists whom may be formally trained in pediatric radiology but have variable experience and/or training in musculoskeletal radiology, as well as our clinical colleagues to better understand the diagnostic utility of MRA. Read More

Authors:  Mehlman Tracey , Riley, Jr. Pat , Person Allison

Keywords:  MRA, Labrum, Hip

Lacroix Caroline,  Vossough Arastoo

Final Pr. ID: Poster #: SCI-040

Intracranial aneurysms are rare in children. The utility, yield, and effectiveness of screening for aneurysms in children and young adults with a predisposing history for aneurysms or a family history of aneurysms is not known. The purpose of this study is to assess the prevalence of positive imaging studies performed for screening of intracranial aneurysms in children with familial history of intracranial aneurysms, and determine the utility and yield of these studies. Read More

Authors:  Lacroix Caroline , Vossough Arastoo

Keywords:  MRA, Vascular Imaging, Brain

Golden Eleza,  Kadom Nadja

Final Pr. ID: Poster #: CR-039

On conventional MRI pediatric vasoproliferative neoplasms or vascular malformations may demonstrate similar features including T2 hyperintensity and enhancement. Hemangiomas can appear similar to vascular malformations when there are large feeding vessels.
Our objective is to illustrate typical imaging findings of vasolproliferative neoplasms and vascular malformations of the head and neck on conventional MRI and the benefits of time resolved MRA to further distinguish between high and slow flow lesions Read More

Authors:  Golden Eleza , Kadom Nadja

Keywords:  time resolved MRA, vascular malformation