zonas por restricción en la Difusión

18:05 Sep 8, 2019
This question was closed without grading. Reason: No acceptable answer

Spanish to English translations [PRO]
Medical - Medical (general) / MRI on brain report
Spanish term or phrase: zonas por restricción en la Difusión
HI there -

I am translating a report of an MRI done on the brain of a patient at a clinic in Mexico City.

I am wondering how to correctly translate this phrase:
zonas por restricción en la difusión

It appears in the conclusions of the report:

> Estudio de Resonancia Magnética Simple del Encéfalo dentro de paràmetros normales.
> No identifico zonas por restriction en la difusión ni colecciones hemáticas.

Any help would be greatly appreciated!

United States
Local time: 06:54

Summary of answers provided
4 +1restricted diffusion (pattern)
Giulia Latini
5zones due to a diffusion restriction
Yudith Madrazo
Summary of reference entries provided
Helena Chavarria

Discussion entries: 6



22 hrs   confidence: Answerer confidence 5/5
zones due to a diffusion restriction

The Diffusion-weighted Magnetic Resonance Imaging (DWI) technique is based on the in vivo detection of the movement of water molecules, which may be restricted in certain pathological conditions such as ischemia and tumors.

Note added at 22 hrs (2019-09-09 16:18:23 GMT)

I'd rather translate the whole sentence: I cannot identify zones due to a diffusion restriction, nor can I identify blood collection.

    Reference: http://https://scielo.conicyt.cl/scielo.php?script=sci_artte...
Yudith Madrazo
Local time: 06:54
Specializes in field
Native speaker of: Native in SpanishSpanish
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7 hrs   confidence: Answerer confidence 4/5Answerer confidence 4/5 peer agreement (net): +1
restricted diffusion (pattern)


Note added at 1 day 2 hrs (2019-09-09 20:06:43 GMT)

*does not

Example sentence(s):
  • The region do not demonstrate restricted diffusion patterns

Giulia Latini
Specializes in field
Native speaker of: Native in ItalianItalian
PRO pts in category: 4

Peer comments on this answer (and responses from the answerer)
agree  Leda Roche
18 hrs
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Reference comments

56 mins peer agreement (net): +1

Reference information:
A relative large number of intracranial diseases can show restricted diffusion and may therefore appear bright on diffusion-weighted images. An incomplete listing by category of disease is shown below, with the most common examples highlighted in red:

The vast majority of neoplasms do not restrict diffusion or change it only mildly. A few interesting tumors, including lymphomas and some highly malignant gliomas, may show significant restriction of diffusion and thus appear remarkably bright on DW images.


Diffusion-weighted imaging (DWI) is a form of MR imaging based upon measuring the random Brownian motion of water molecules within a voxel of tissue. In general simplified terms, highly cellular tissues or those with cellular swelling exhibit lower diffusion coefficients. Diffusion is particularly useful in tumor characterization and cerebral ischemia.

A great deal of confusion exists in the way the clinicians and radiologists refer to diffusion restriction, with both groups often appearing to not actually understand what they are referring to.

The first problem is that the term "diffusion-weighted imaging" is used to denote a number of different things:

isotropic diffusion map (what most radiologists and clinicians will refer to as DWI)
the pulse sequence that results in the generation of the various images (e.g. isotropic map, b=0, ADC)
a more general term to encompass all diffusion techniques including diffusion tensor imaging
Additionally, confusion also exists in how to refer to abnormal restricted diffusion. This largely stems from the initial popularisation of DWI in stroke, which presented infarcted tissue as high signal on isotropic maps and described it merely as "restricted diffusion", implying that the rest of the brain did not demonstrate restricted diffusion, which is clearly not true. Unfortunately, this shorthand is appealing and is more widespread than using the more accurate but clumsier "diffusion demonstrates greater restriction than one would expect for this tissue."


Note added at 1 hr (2019-09-08 19:05:32 GMT)

Diffusion-weighted magnetic resonance imaging (DWI or DW-MRI) is the use of specific MRI sequences as well as software that generates images from the resulting data that uses the diffusion of water molecules to generate contrast in MR images. It allows the mapping of the diffusion process of molecules, mainly water, in biological tissues, in vivo and non-invasively.

DWI showing restricted diffusion in the mesial dorsal thalami consistent with Wernicke encephalopathy


Helena Chavarria
Native speaker of: Native in EnglishEnglish
PRO pts in category: 316

Peer comments on this reference comment (and responses from the reference poster)
agree  Chema Nieto Castañón
3 hrs
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