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Vol. 62. Issue 4.
Pages 320-326 (July - August 2020)
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Vol. 62. Issue 4.
Pages 320-326 (July - August 2020)
Original article
Should susceptibility-weighted imaging be included in the basic protocol for magnetic resonance imaging of the brain?
¿Se debe incluir la secuencia de susceptibilidad magnética en el protocolo de resonancia magnética cerebral básico?
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E. Utrera Pérez
Corresponding author
elenautreraperez@gmail.com

Corresponding author.
, E. Santos Armentia, N. Silva Priegue, A. Villanueva Campos, C. Jurado Basildo
Departamento de Radiología, Hospital Povisa, Vigo, Pontevedra, Spain
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Tables (4)
Table 1. Radiological findings found in the SWI sequence.
Table 2. Clinical information considered indicative of programming SWI.
Table 3. Relationship between risk factors and age in the two study groups.
Table 4. Relationship between general and relevant findings between the two study groups.
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Abstract
Objective

To analyse the clinical impact of routine acquisition of susceptibility-weighted imaging (SWI) in magnetic resonance imaging (MRI) studies of the brain.

Material and methods

This prospective observational study included all patients undergoing brain MRI including SWI during a 6-month period. Patients were divided into two groups based on the clinical information provided: Group 1 comprised patients in whom SWI acquisition formed part of the brain MRI protocol, and Group comprised patients who underwent SWI without these sequences being included in the protocol. We recorded patients’ age, sex, and risk factors (hypertension, history of brain trauma or intracranial vascular malformations). We analysed the SWI findings, whether these findings were visible on the other sequences, and whether identifying these findings resulted in substantial changes to the radiological report.

Results

There were 62 patients in group 1 and 79 in group 2. The groups were similar in age and risk factors. SWI findings resulted in substantial changes to the radiological report in 34% of the patients in group 1 and in 14% of those in group 2; this difference was statistically significant.

Conclusion

SWI can help radiologists detect findings not seen on conventional brain MRI that sometimes result in substantial changes to the radiological report.

Keywords:
Brain
Magnetic resonance imaging
Paramagnetic
Resumen
Objetivo

Analizar el impacto clínico de adquirir la secuencia de susceptibilidad magnética (SWI) de forma rutinaria en los estudios de resonancia magnética (RM) cerebral.

Material y métodos

Se lleva a cabo un estudio prospectivo observacional unicéntrico durante 6 meses a pacientes a los que se le realizó una RM cerebral. Los grupos de estudio se establecieron basándose en la información clínica remitida: el grupo 1 de estudio está formado por aquellos pacientes a los que el radiólogo protocolizó la adquisición de la secuencia SWI, y el grupo 2, por aquellos a los que se les realizó la secuencia SWI sin haber sido protocolizada. Se recogen la edad, sexo y factores de riesgo (hipertensión arterial, historia de traumatismo craneal o de malformaciones vasculares intracraneales). Se analizaron los hallazgos en la secuencia de SWI, si estos eran visibles en el resto de las secuencias y si su identificación suponía cambios sustanciales en el informe radiológico del paciente.

Resultados

El grupo 1 estaba formado por 62 pacientes y el grupo 2, por 79. No hubo diferencias al comparar la edad y los factores de riesgo entre los dos grupos. En el grupo 1, los hallazgos de la SWI supusieron un cambio en el informe radiológico en el 34% de los pacientes, y en el grupo 2, en un 14%: las diferencias fueron estadísticamente significativas.

Conclusión

La secuencia SWI puede ayudar al radiólogo a detectar hallazgos adicionales a las secuencias convencionales en la RM cerebral, que en algunos casos suponen un cambio en el informe radiológico.

Palabras clave:
Cerebro
Imagen por resonancia magnética
Paramagnético

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