Progress in diagnostic imaging of anal inflammatory diseases

The authors present issues related to the diagnosis of the most common inflammatory diseases of the anus. They deal with anal fistulas and abscesses in a special way. They present various diagnostic methods: from basic proctological examination to instrumental methods. They asses the usefulness, disadvantages and limitations of individual methods. The highest assessment of the presented diagnostic methods was obtained by two tests, i.e. magnetic resonance imaging and endosonographic examination in the 3D option, supported by the use of the render mode option or hydrogen peroxide as a contrast agent. In a sense, both examinations are comparable when it comes to inflammatory diseases of the anus. For endosonographic examination, the advantage is low cost, repeatability and availability. The disadvantage of magnetic resonance imaging is the high price of the test, the low availability and possible claustrophobia of the patient or the presence of metal implants. However, the undeniable advantage of magnetic resonance imaging is the ability to assess anal fistulas or abscesses located high above the levator muscles. In the assessment of deeply located lesions, the advantage of magnetic resonance results from the shorter focus of the endosonographic probe. The high frequency of the probe gives good image quality, but it is paid for the shorter penetration of the ultrasound rays. The use of the render mode or contrast – hydrogen peroxide option puts the endosonographic examination in a one row with magnetic resonance imaging in the diagnosis of the most frequent occurring fistulas and abscesses. Considering lower costs, repeatability of the endosonographic examination it is a valuable modern instrument in the diagnosis of inflammatory lesions of the anus.

Download Full-text

Сauses of Dizziness in Patients with Suspected Stroke

Russian Sklifosovsky Journal Emergency Medical Care ◽

10.23934/2223-9022-2018-7-3-217-221 ◽

2018 ◽

Vol 7 (3) ◽

pp. 217-221

Author(s):

E. V. Shevchenko ◽

G. R. Ramazanov ◽

S. S. Petrikov

Keyword(s):

Magnetic Resonance Imaging ◽

Magnetic Resonance ◽

Demyelinating Disease ◽

Heart Rhythm ◽

Diagnostic Methods ◽

Deficiency Anemia ◽

Resonance Imaging ◽

Peripheral Vestibulopathy ◽

Suspected Stroke ◽

The Brain

Background Acute dizziness may be the only symptom of stroke. Prevalence of this disease among patients with isolated dizziness differs significantly and depends on study design, inclusion criteria and diagnostic methods. In available investigations, we did not find any prospective studies where magnetic resonance imaging, positional maneuvers, and Halmagyi-Curthoys test had been used to clarify a pattern of diseases with isolated acute dizziness and suspected stroke.Aim of study To clarify the pattern of the causes of dizziness in patients with suspected acute stroke.Material and methods We examined 160 patients admitted to N.V. Sklifosovsky Research Institute for Emergency Medicine with suspected stroke and single or underlying complaint of dizziness. All patients were examined with assessment of neurological status, Dix-Hollpike and Pagnini-McClure maneuvers, HalmagyiCurthoys test, triplex scans of brachiocephalic arteries, transthoracic echocardiography, computed tomography (CT) and magnetic resonance imaging (MRI) of the brain with magnetic field strength 1.5 T. MRI of the brain was performed in patients without evidence of stroke by CT and in patients with stroke of undetermined etiology according to the TOAST classification.Results In 16 patients (10%), the cause of dizziness was a disease of the brain: ischemic stroke (n=14 (88%)), hemorrhage (n=1 (6%)), transient ischemic attack (TIA) of posterior circulation (n=1 (6%)). In 70.6% patients (n=113), the dizziness was associated with peripheral vestibulopathy: benign paroxysmal positional vertigo (n=85 (75%)), vestibular neuritis (n=19 (17%)), Meniere’s disease (n=7 (6%)), labyrinthitis (n=2 (1,3%)). In 6.9% patients (n=11), the cause of dizziness was hypertensive encephalopathy, 1.9% of patients (n=3) had heart rhythm disturbance, 9.4% of patients (n=15) had psychogenic dizziness, 0.6% of patients (n=1) had demyelinating disease, and 0.6% of patients (n=1) had hemic hypoxia associated with iron deficiency anemia.Conclusion In 70.6% patients with acute dizziness, admitted to hospital with a suspected stroke, peripheral vestibulopathy was revealed. Only 10% of patients had a stroke as a cause of dizziness.

Download Full-text

Whiplash Injuries Can be Visible by Functional Magnetic Resonance Imaging

Pain Research and Management ◽

10.1155/2006/413757 ◽

2006 ◽

Vol 11 (3) ◽

pp. 197-199 ◽

Cited By ~ 20

Author(s):

Bengt H Johansson

Keyword(s):

Magnetic Resonance Imaging ◽

Magnetic Resonance ◽

Functional Magnetic Resonance Imaging ◽

Medical Condition ◽

Diagnostic Methods ◽

Functional Magnetic Resonance ◽

Resonance Imaging ◽

Eye Problems ◽

Concentration Sensitivity ◽

Whiplash Trauma

Whiplash trauma can result in injuries that are difficult to diagnose. Diagnosis is particularly difficult in injuries to the upper segments of the cervical spine (craniocervical joint [CCJ] complex). Studies indicate that injuries in that region may be responsible for the cervicoencephalic syndrome, as evidenced by headache, balance problems, vertigo, dizziness, eye problems, tinnitus, poor concentration, sensitivity to light and pronounced fatigue. Consequently, diagnosis of lesions in the CCJ region is important. Functional magnetic resonance imaging is a radiological technique that can visualize injuries of the ligaments and the joint capsules, and accompanying pathological movement patterns.Three severely injured patients that had been extensively examined without any findings of structural lesions were diagnosed by functional magnetic resonance imaging to have injuries in the CCJ region.These injuries were confirmed at surgery, and after surgical stabilization the medical condition was highly improved.It is important to draw attention to the urgent need to diagnose lesions and dysfunction in the CCJ complex and also improve diagnostic methods.

Download Full-text

Magnetic resonance imaging template to standardize reporting of anal fistulas

Techniques in Coloproctology ◽

10.1007/s10151-020-02384-6 ◽

2021 ◽

Author(s):

I. Sudoł-Szopińska ◽

G. A. Santoro ◽

M. Kołodziejczak ◽

A. Wiaczek ◽

U. Grossi

Keyword(s):

Magnetic Resonance Imaging ◽

Magnetic Resonance ◽

Treatment Strategies ◽

Cross Sectional Study ◽

Resonance Imaging ◽

Anal Fistulas ◽

Cross Sectional ◽

Radiology Reports ◽

Colorectal Surgeons ◽

Magnetic Resonance Imaging Mri

AbstractAnal fistula (AF) is a common referral to colorectal surgeons. Management remains challenging and sometimes controversial. Magnetic resonance imaging (MRI) is commonly performed in initial workup for AF. However, reports often lack key information for guiding treatment strategies. It has been shown that with structured radiology reports, there is less missing information. We present a structured MRI template report including 8 key descriptors of anal fistulas, whose effectiveness and acceptability are being assessed in a cross-sectional study (NCT04541238).

Download Full-text

MRI Susceptibility Artefacts Related to Scaphoid Screws: the Effect of Screw Type, Screw Orientation and Imaging Parameters

Journal of Hand Surgery (European Volume) ◽

10.1054/jhsb.2001.0717 ◽

2002 ◽

Vol 27 (2) ◽

pp. 165-170 ◽

Cited By ~ 30

Author(s):

M. GANAPATHI ◽

G. JOSEPH ◽

R. SAVAGE ◽

A. R. JONES ◽

B. TIMMS ◽

...

Keyword(s):

Magnetic Resonance Imaging ◽

Magnetic Field ◽

Titanium Alloy ◽

Magnetic Resonance ◽

Main Magnetic Field ◽

Resonance Imaging ◽

Metal Implants ◽

Imaging Parameters ◽

Susceptibility Artefact

Metal implants produce susceptibility artefacts in magnetic resonance imaging. We have explored the effects of scaphoid screw characteristics and orientation on MR susceptibility artefact. Titanium alloy, smallness and longitudinal alignment with the z-axis of the main magnetic field reduce the size of the susceptibility artefact.

Download Full-text

Abstract 2812: A multi-modality robotic ultrasound and bioluminescence system provides a low-cost alternative to magnetic resonance imaging for measurement of orthotopic pancreatic tumors

10.1158/1538-7445.am2021-2812 ◽

2021 ◽

Author(s):

Juan Rojas ◽

Jordan Joiner ◽

Brian Velasco ◽

Alexandra De Lille ◽

Tomek J. Czernuszewicz ◽

...

Keyword(s):

Magnetic Resonance Imaging ◽

Magnetic Resonance ◽

Low Cost ◽

Pancreatic Tumors ◽

Resonance Imaging ◽

Robotic Ultrasound

Download Full-text

A low cost, volunteer-based program to prepare children to undergo magnetic resonance imaging without sedation

Children s Health Care ◽

10.1080/02739615.2018.1545581 ◽

2018 ◽

Vol 49 (1) ◽

pp. 1-19

Author(s):

Michele Capurso ◽

Corrado Rossetti ◽

Luca Mutti ◽

Anita Ciani ◽

Valerio Santangelo

Keyword(s):

Magnetic Resonance Imaging ◽

Magnetic Resonance ◽

Low Cost ◽

Resonance Imaging

Download Full-text

Agreement between magnetic resonance imaging, myelography, and surgery for detecting recurrent, thoracolumbar intervertebral disc extrusion in dogs

Veterinary and Comparative Orthopaedics and Traumatology ◽

10.3415/vcot-12-05-0067 ◽

2013 ◽

Vol 26 (01) ◽

pp. 12-18 ◽

Cited By ~ 5

Author(s):

B. A. Brisson ◽

S. G. Nykamp ◽

D. Reynolds

Keyword(s):

Magnetic Resonance Imaging ◽

Magnetic Resonance ◽

Intervertebral Disc ◽

Interobserver Agreement ◽

Surgical Decompression ◽

Diagnostic Methods ◽

Resonance Imaging ◽

Disc Disease ◽

Recurrent Lesion ◽

Magnetic Resonance Imaging Mri

Summary Objectives: Although magnetic resonance imaging (MRI) is reported to be superior to myelography to determine the location and site of first time disc herniation, comparison of these diagnostic methods in cases of recurrent intervertebral disc disease (IVD) herniation after a first surgery has not been evaluated. The objective was to compare the diagnostic accuracy of MRI and myelography in a series of dogs undergoing repeat surgical decompression for recurrent IVD extrusion when compared to the gold standard of surgery. Methods: Ten dogs with recurrent IVD herniation underwent MRI and myelography followed by surgical decompression. Three observers reviewed the images to determine the site and side of the first surgery and the recurrent lesion. Agreement was determined by calculating a kappa (κ) score. Results: Substantial interobserver agreement was noted for recurrent lesion site using MRI and myelography (κ = 0.77 vs. 0.73) and when comparing MRI and myelography to the reported surgical site (κ = 0.73 vs. 0.67). Interobserver agreement was greater with MRI for circumferential location compared to myelography (κ = 0.76 vs. 0.43), similar to what was found when comparing to surgical side (κ = 0.82 vs. 0.49). The previous surgical site in this study had no effect on ability to identify the new lesion. Clinical significance: Despite the limitations of MRI, there was greater agreement between observers using MRI for both the recurrent and first lesion.

Download Full-text

Magnetic resonance imaging and bone scintigraphy in bone metastasis detection: A comparative study

Vojnosanitetski pregled ◽

10.2298/vsp1006453l ◽

2010 ◽

Vol 67 (6) ◽

pp. 453-458 ◽

Cited By ~ 2

Author(s):

Silvija Lucic ◽

Katarina Nikoletic ◽

Andrea Peter ◽

Milos Lucic ◽

Dusan Jovanovic

Keyword(s):

Magnetic Resonance Imaging ◽

Magnetic Resonance ◽

Bone Metastasis ◽

Bone Scintigraphy ◽

Regions Of Interest ◽

Diagnostic Methods ◽

Whole Body ◽

Resonance Imaging ◽

Mutual Correlation ◽

Diagnostic Potential

Background/Aim. Bone scintigraphy is well-known method for the detection of neoplastic lesions with a high sensitivity and, at the same time, a lower specificity. On the other hand magnetic resonance imaging (MRI) is previously established noninvasive imaging method regarding its diagnostic specificity. The aim of this study was to determine the possibilities and to correlate two different diagnostic methods - bone scintigraphy and MRI in the detection of bone metastasis in the spine and pelvic bones. Methods. A total of 123 patients who underwent both bone scintigraphy and spine and pelvic MRI on 1.5 T MR imager were enrolled in this study. Scans were subsequently analyzed in total and divided in regions of interest (cervical, upper, middle and lower thoracic, upper and lower lumbar and pelvic region, which includes sacral spinal segment); afterwards the total number of 585 matching regions were compared and statistically analyzed. Results. The statistical analysis demonstrated significant correlation between the findings of both methods in total. Divided by regions of interest, significant degrees of correlation were demonstrated in all of them, except in the cervical spine region where the r-value was in the range of low correlation. Conclusion. Having a high mutual correlation, bone scintigraphy and MRI are to be considered as the complementary diagnostic methods in the detection of bone metastases. Still, increased diagnostic potential of MRI may highlights negative bone scintigraphy findings in the patients with solitary metastatic lesions or diffuse vertebral infiltration. Advances in the bone scintigraphy (single photon emission tomography - SPECT, SPECTcomputed tomography - SPECT-CT) and MRI (whole body MRI, diffusion MRI), make it possible the diagnostic potential of both methods will result in a further improvement in bone metastasis detection.

Download Full-text