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Imaging Studies I: CT and MRI

Imaging Studies I: CT and MRI

Introduction: MRI and CT scans are crucial advancements in medical imaging techniques, playing a vital role in diagnosing conditions related to the gastrointestinal (GI) system. Each scan serves distinct purposes, targets specific areas, and requires unique nursing duties.
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Computed Tomography (CT) scan:
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Imaging Studies for Cardiovascular System IV: CMRI

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Imaging Studies IV: Magnetic Resonance Imaging

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Related Experiment Video

Updated: Jun 13, 2026

$MRI-guided Focused Ultrasound Thalamotomy for Patients with Medically-refractory Essential Tremor$

MRI-guided Focused Ultrasound Thalamotomy for Patients with Medically-refractory Essential Tremor

Published on: December 13, 2017

Imaging essential tremor.

Ioannis U Isaias¹, Giorgio Marotta, Shigeki Hirano

¹Department of Human Physiology, University of Milano, Milano, Italy. iuisaias@yahoo.it

Movement Disorders : Official Journal of the Movement Disorder Society

|May 4, 2010

Summary

This summary is machine-generated.

Parkinson disease (PD) shows declining dopamine transporter (DAT) levels, unlike essential tremor (ET). Mild DAT impairment in the caudate nucleus may link to ET tremor.

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Electromagnetic Source Imaging in Presurgical Evaluation of Children with Drug-Resistant Epilepsy

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$MRI-guided Focused Ultrasound Thalamotomy for Patients with Medically-refractory Essential Tremor$

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Published on: December 13, 2017

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Published on: September 20, 2024

Area of Science:

Neuroscience
Radiology
Neurology

Background:

Essential tremor (ET) and Parkinson disease (PD) are common movement disorders.
Dopamine transporter (DAT) imaging is used to differentiate these conditions.
Longitudinal changes in DAT binding in ET are not well understood.

Purpose of the Study:

To investigate longitudinal changes in striatal dopamine transporter (DAT) binding in ET and PD.
To compare DAT binding patterns between ET, PD, and healthy controls (HC).
To explore potential imaging biomarkers for differentiating ET and PD.

Main Methods:

Two sequential SPECT scans using N-omega-fluoropropyl-2beta-carbomethoxy-3beta-(4-iodophenyl) tropane (SPECT-DAT) were performed in 20 ET and 13 PD subjects.
A single SPECT-DAT scan was performed in 23 HC.
[(99m)Tc]ethyl cysteinate dimer bicisate SPECT was used for regional brain network analysis in subsets of ET, PD, and HC.

Main Results:

PD subjects exhibited reduced DAT binding compared to ET and HC, with a 7.3% annual decline in the contralateral putamen.
No significant baseline DAT uptake differences or longitudinal decline were observed in ET subjects.
Discriminant and partition analyses revealed some overlap between ET and PD in caudate nucleus DAT uptake.

Conclusions:

Parkinson disease (PD) and essential tremor (ET) do not share a common pattern of progressive dopaminergic transporter loss.
Mild dopamine transporter impairment in the caudate nucleus may be associated with tremor onset in ET.
SPECT-DAT imaging can help differentiate PD from ET, though caudate nucleus uptake shows overlap.