Cervical intradural disc herniation (IDH) is a rare condition and only 25 cases of cervical have been reported. We report a 45-year-old male who presented with sudden onset right lower limb weakness after lifting heavy weight. Magnetic resonance imaging of the cervical spine showed C5/6 disc prolapse with intradural extension. ...

Oblique radiographs are often ordered to evaluate the patency of cervical intervertebral foramina. Previous studies have shown that computed tomography (CT) provides accurate measurements of foraminal dimensions. Up until now, no study has directly compared the diagnostic utility of oblique radiographs and CT. We conducted a study to quantify the ...

The aim of this retrospective study was to assess validity of the straight-leg raise (SLR) test using magnetic resonance imaging (MRI) results as a reference standard in a group of patients with L4-L5 and L5-S1 lumbar-herniated disks and sciatic pain. The relationship between diagnostic accuracy of this test, age classes, ...

To evaluate whether the information gained by three coregistration systems (sextant, hemi-prostate, and whole gland) differs significantly, suggesting that one approach should be routinely favored over the others. Despite its known limitations, sextant is the generally accepted standard for magnetic resonance imaging (MRI) and biopsy coregistration; nevertheless, depending on the ...

To evaluate the principal methodological aspects of whole-body magnetic resonance imaging (MRI) including diffusion-weighted imaging (DWI) with background suppression using a time-optimized protocol for restaging of prostate cancer patients in a technical feasibility study. Seventeen patients underwent MRI at 1.5T from the base of the skull to the proximal thigh ...

Spinal intradural cysticercosis is a rare manifestation of neurocysticercosis. We report a unique patient who showed visual symptoms and normal imaging of the brain caused by isolated spinal neurocysticercosis. A 59-year-old male patient was admitted to the emergency unit with a history of severe headache and progressive blurred vision. Brain ...

Objective:  Study of the nutrition pathway for lumbar intervertebral disk cartilage of normal goats. Methods:  Four lumbar intervertebral disks from each of eight 24-month-old goats (32 disks) were studied. After the goats had been anesthetized, signal intensity changes in the regions of interest (ROI) were observed by dynamic contrast enhanced ...

PURPOSE: To assess whether an education program on CT and MRI prostate anatomy would reduce inter- and intraobserver prostate contouring variation among experienced radiation oncologists. METHODS AND MATERIALS: Three patient CT and MRI datasets were selected. Five radiation oncologists contoured the prostate for each patient on CT first, then MRI, ...

Currently, the presence of persistent primitive trigeminal artery (PPTA) is detected by digital subtraction angiography (DSA); most publications on this cerebrovascular variation have been individual case reports. This study is to evaluate the efficacy of 3-dimensional time-of-flight magnetic resonance angiography (3D-TOF MRA) at 3.0 T for the detection and classification ...

Acute gastrointestinal bleeding is a common medical emergency, which carries a significant mortality. CT Angiography is an important non-invasive diagnostic tool, which can be used to plan subsequent endovascular or surgical management. The cases presented demonstrate that a meticulous and systematic approach to image interpretation is necessary, in particular, to ...

Objective To investigate the role of transrectal real-time tissue elastography (TRTE) in the diagnosis of prostate cancer (PCa). Methods Eighty-four patients with suspected PCa and scheduled for prostate biopsies underwent TRTE, digital rectal examination (DRE), transrectal ultrasonography (TRUS), and magnetic resonance imaging (MRI). The findings of TRTE were compared with ...

Purpose: To assess the incremental value of diffusion-weighted (DW) magnetic resonance (MR) imaging over T2-weighted MR imaging at 3 T for prostate cancer detection and to investigate the use of the apparent diffusion coefficient (ADC) to characterize tumor aggressiveness, with whole-mount step-section pathologic analysis as the reference standard. Materials and ...

Background New or worsening bone lesions in patients responding to treatment, known as the flare phenomenon is well described on (99m)Tc-MDP bone scintigraphy, but to our knowledge has not previously been described on CT. The appearance of new or worsening bone sclerosis on CT in patients with prostate cancer may ...

Purpose: To assess the feasibility of using a remote-controlled, pneumatically actuated magnetic resonance (MR)-compatible robotic device to aid transrectal biopsy of the prostate performed with real-time 3-T MR imaging guidance. Materials and Methods: This prospective study was approved by the ethics review board, and written informed consent was obtained from ...

Over the past few years, several studies have proved the potential role of diagnostic procedures in patients with treated prostate cancer who develop biochemical relapse. Notably, no precise indications exist regarding the use of emerging modalities such as positron emission tomography/computerized tomography (PET/CT) scanning with radiolabeled choline. However, the literature ...

PURPOSE OF REVIEW: To evaluate the role of PET/computed tomography (CT) imaging in patients with prostate cancer and to provide clinical recommendations, both in pretreatment and in post-treatment phase. RECENT FINDINGS: The potential role of PET/CT for evaluating intraprostatic disease, staging and restaging prostate cancer patients has been largely investigated. ...

FDG PET imaging is generally not useful for prostate cancer. Nevertheless, incidental intense FDG uptake in the prostate warrants further evaluation to assess for prostatic malignancy. We report a case where intense FDG uptake was incidentally noted in an enlarged prostate on FDG PET/CT scan performed for a large left ...

Objectives: To describe the computed tomography (CT) features of the prostate gland and determine prostate size using CT in entire male dogs. Methods: The prostate gland was evaluated in 35 dogs. Morphological features including homogeneity, delineation, shape and intraprostatic differentiation were assessed. Height, length, width, area, volume and attenuation values ...

To evaluate the accuracy of F-fluoride PET/computed tomography (CT) to detect bone metastases (BMs) in a breast and prostate cancer population, using magnetic resonance imaging (MRI) or thin-slice CT as a gold standard. We have prospectively included 34 patients with breast (N=24) or prostate cancer (N=10) at high risk of ...

Myelography, computed tomography (CT), and magnetic resonance (MR) imaging are the diagnostic modalities currently used in the evaluation of dogs with suspected disc herniation. Where high-field MR imaging is available, it is considered the optimal modality for any myelopathy in dogs, including those with disc disease. CT myelography may be ...

BACKGROUND: The purpose of this study was to evaluate interobserver agreement of prostatic MRI in assessing the performance of staging prostate carcinoma in comparison with histopathologic step section prostate specimens. METHODS: We retrospectively evaluated 46 patients who underwent prostatic MRI examination at 1.5T MRI and "subsequently" radical prostatectomy. All MR-images ...

PURPOSE: : To determine the prostate volumes defined by using MRI and CT scans, as well as the difference between prostate delineation in MRI and CT in three dimensions (3D). A further goal was to use MRI to identify subgroups of patients in whom seminal vesicle irradiation can be avoided. ...

CONTEXT: Although magnetic resonance imaging (MRI) is emerging as the most commonly used imaging modality for prostate cancer (PCa) detection, treatment planning, and follow-up, its acceptance has not been uniform. Recently, great interest has been shown in multiparametric MRI, which combines anatomic T2-weighted (T2W) imaging with MR spectroscopic imaging (MRSI), ...

OBJECTIVES: To examine whether one could spare patients with a clinical suspicion of prostate cancer (PCa) but inapparent tumor on multimodality endorectal magnetic resonance imaging (e-MRI) of the prostate from undergoing prostate biopsy. METHODS: A total of 109 patients with a clinical suspicion of PCa underwent conventional and functional e-MRI ...

PURPOSE OF REVIEW: To review contemporary imaging of pelvic lymph nodes in patients with prostate cancer as well as to analyze its significance and usefulness in clinical practice. RECENT FINDINGS: Because of poor sensitivity and specificity of computed tomography (CT) and MRI, new imaging modalities of lymph nodes in prostate ...

The integrated modality positron emission tomography/computed tomography (PET/CT) with C-11 choline is an established diagnostic tool for restaging prostate cancer patients with a biochemical failure after primary treatment. Thymoma is a rare tumor originating in thymus epithelial cells, asymptomatic in one-third to one-half of patients, and often occurring in the ...

MRI of the prostate can aid in many aspects of prostate cancer management, from initial detection to treatment planning and follow-up. This review describes the current strengths and limitations of conventional anatomic and molecular MR imaging techniques (including MR spectroscopic imaging and dynamic contrast-enhanced imaging) for aiding prostate cancer management. ...

Objective:  To observe the accuracy of computer-assisted navigation (CAN) in cervical pedicle screw installation and to analyze the reasons for screw malposition. Methods:  From October 2004 to December 2009, 144 cervical pedicle screws were installed in 25 patients with cervical spinal diseases using CAN. Screw position and direction were measured ...

RATIONALE AND OBJECTIVES: MRI of the prostate offers the possibility to localize and stage prostate cancer and may improve detection of disease. Currently, T2-weighted images and spectroscopy are the most commonly used MRI techniques. To assess the value of prostate MRI and its different modalities in the process of diagnosis, ...

We determined whether there is a correlation between D'Amico risk stratification and the degree of suspicion of prostate cancer on multiparametric magnetic resonance imaging based on targeted biopsies done with our electromagnetically tracked magnetic resonance imaging/ultrasound fusion platform. A total of 101 patients underwent 3 Tesla multiparametric magnetic resonance imaging ...

The aim of our pilot study was to demonstrate the feasibility and dosimetric quality of MR-guided HDR prostate brachytherapy in a low-field 0.35T open MRI scanner and to present our initial clinical experiences. 16 patiets with intermediate- to high-risk localized prostate cancer were treated with 46-60 Gy of external beam radiotherapy ...

Cancers that metastasize to the cauda equina are uncommon. Only seventeen cases were reported. Those from pulmonary squamous cell carcinoma was never been published to our knowledge. MATERIAL and A 79-year-old male patient presented with low back pain since 1 year and severe sacral pain irradiating to the left leg, ...

The lumbar spines of 25 long-distance runners were examined using an upright magnetic resonance imaging scanner. All volunteer runners were scanned before and after running for 1 h. Scanning was performed with the runners seated upright (neutral), leaning forwards (flexion) and leaning backwards (extension). All measured discs showed a reduction ...

To evaluate transrectal ultrasound, amplitude Doppler ultrasound, conventional T2-weighted magnetic resonance imaging, spectroscopy and dynamic contrast-enhanced magnetic resonance imaging in localizing and locally staging low-risk prostate cancer. Prostate cancer has been diagnosed at earlier stages and the most accepted classification for low-risk prostate cancer is based on clinical stage T1c ...

Magnetic resonance imaging (MRI) has been approved as an appropriate radiological modality for temporomandibular joint (TMJ) diagnosis, whereas the results of international multicenter studies impressively show the limitations of static three-dimensional MRI. The state of the art for dynamic imaging of the TMJ in real-time are TrueFISP sequences in one ...

Objectives: We studied patients managed by active surveillance to determine whether there was a difference over time in apparent diffusion coefficients (ADCs) derived from diffusion-weighted MRI in those who progressed to radical treatment (progressors, n = 17) compared with those who did not (non-progressors, n = 33). Methods: 50 consecutive ...

To determine the effect of pelvic arch interference and the depth of the pelvic cavity, as shown on preoperative magnetic resonance imaging (MRI), on the performance of extraperitoneal laparoscopic radical prostatectomy (ELRP). In 115 patients, pelvic bone images were obtained at the time of prostate MRI before ELRP. In the ...

The spinal dura is anchored within the vertebral canal by connective tissue in the epidural space as well as the spinal roots. Inadvertent disruption of these dural attachments may lead to durotomy and cerebrospinal fluid (CSF) leaks. We observed well-developed connective tissue ligaments connecting the lumbar dura to the spinal ...

SYNOPSIS: Musculoskeletal imaging of the spine can be an invaluable tool to inform clinical decision making in patients with spinal pain. An understanding of the technology involved in producing and interpreting high-resolution images produced from magnetic resonance imaging (MRI) of the human spine is necessary to better appreciate which sequences ...

We evaluated the interrelationship between rectal content and intrafraction motion of the prostate. Forty seven prostate cancer patients instructed to remove their rectal gas were imaged by planning CT and MRI before radiotherapy (RT) and during RT. The total scan time was comparable to our cone-beam CT scanning and treatment ...

The purpose of this study is to quantify the magnitudes of the position shifts of internal structures together with the correlation between the day-to-day positioning of the prostate and the bony anatomy using an integrated CT-linear accelerator system for external beam radiation therapy for prostate cancer. A total of 1176 ...

Purpose. It is somewhat surprising that radiographic criteria for lumbar stenosis have been transposed from radiography and CT to MR without scientific validation. As these radiographic criteria were developed via population studies with criteria defned by two standard deviations from the mean, we sought to perform the same methodology via ...

To investigate whether apparent diffusion coefficients (ADCs) derived from diffusion-weighted (DW) magnetic resonance (MR) imaging at 3 T correlate with the clinical risk of prostate cancer in patients with tumors that are visible on MR images, with MR imaging/transrectal ultrasonography (US) fusion-guided biopsy as a reference. Forty-eight consecutive patients (median ...

Contrast-enhanced magnetic resonance angiography is routinely performed using parallel imaging to best capture the first pass of contrast material through the target vasculature, followed by digital subtraction to suppress the appearance of unwanted signal from background tissue. Both processes, however, amplify noise and can produce uninterpretable images when large acceleration ...

The aim of this study is to determine the diagnostic value of high-resolution 3D unenhanced ECG-gated respiratory-navigated MR angiography (MRA) of the renal arteries using a steady-state free precession (SSFP) technique in comparison with 1.0-molar contrast-enhanced MRA in patients with suspected renal artery stenosis. Forty-five consecutive patients underwent unenhanced MRA ...

The aim of this study was a comparison of the diagnostic value of time-of-flight magnetic resonance angiography (TOF-MRA) and contrast-enhanced (CE) MRA in the setting of acute stroke MRI. The hypothesis was that CE-MRA has at least the same diagnostic value as the commonly used TOF-MRA. A total of 66 ...

PURPOSE: The sequencing of external beam radiotherapy (EBRT) and a high-dose rate brachytherapy (HDRB) boost is often interchangeable in clinical practice. When given before EBRT, HDRB could induce volume alterations in the prostate, which may have significant implications for EBRT dosimetry. We aimed to assess the influence of HDRB on ...

To assess the accuracy of colour-Doppler ultrasound (CDUS), contrast-enhanced ultrasonography (CEUS), computed tomography angiography (CTA) and magnetic resonance angiography (MRA) in detecting endoleaks after endovascular abdominal aortic aneurysm repair (EVAR). Prospective, observational study. From December 2007 to April 2009, 108 consecutive patients who underwent EVAR were evaluated with CDUS, CEUS, ...

The objective of this work was to develop an easily applicable technique and a standardized protocol for high-quality post-mortem angiography. This protocol should (1) increase the radiological interpretation by decreasing artifacts due to the perfusion and by reaching a complete filling of the vascular system and (2) ease and standardize ...

The purpose of this study was to investigate the feasibility of three-dimensional contrast-enhanced magnetic resonance angiography (3D-CE-MRA) for the non-invasive anatomical evaluation of the thoracic vasculature in five normal Beagles. After intravenous gadolinium administration and a cardio-respiratory gating protocol, fast 3D gradient echo pulse sequence MRA was performed employing a ...