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Papers by Jean-yves Tanguy
Journal of Neuroradiology, 2020
Breast screening in the UK has been implemented for over 20 years and annually nearly two million... more Breast screening in the UK has been implemented for over 20 years and annually nearly two million women are now screened with an estimated 1,400 lives saved. Nationally, some 700 individuals interpret screening mammograms in almost 110 screening centres. Currently, ...
Gériatrie et Psychologie Neuropsychiatrie du Viellissement, 2020
Clinical Neurology and Neurosurgery, 2008
La compression d'images represente une alternative de faible cout a l'augmentation system... more La compression d'images represente une alternative de faible cout a l'augmentation systematique de la capacite de stockage des systemes d'archivage et des lignes de transmission (PACS). Afin d'etudier les effets de la compression irreversible par ondelettes (base de la norme JPEG2000) sur des radiographies thoraciques d'emblee numeriques (Thoravision®), nous avons defini un protocole complet d'evaluation. Les taux de compression de 20:1, 40:1, 60:1 ont ete evalues en double aveugle par 3 radiologues dans des conditions standardisees sur des structures anatomiques (suivant 11 criteres portant sur les details, les contours et les artefacts sur une population de 30 sujets sains) et pathologiques (pneumothorax et syndromes interstitiels). Des courbes ROC ont ete realisees a partir de deux populations de 20 patients. Notre etude determine un taux de compression acceptable a 20:1 pour les radiographies normales et 60:1 pour les images pathologiques. L'interpret...
Geriatrie et psychologie neuropsychiatrie du vieillissement, 2019
The hippocampus is a small internal temporal cerebral structure, which plays a primordial role in... more The hippocampus is a small internal temporal cerebral structure, which plays a primordial role in the mechanisms of memory. Magnetic resonance imaging (MRI) is the reference imaging modality for the hippocampal analysis. In older adults, dementia represents the majority of hippocampal diseases, but other specific pathologies must be known in the differential diagnosis. Many hippocampal abnormalities are represented by a loss of substance (atrophy). However, most acute or recent hippocampal damage is detected by MRI signal abnormalities. The aim of this article is to offer a pictorial review of the normal and pathological hippocampal aspects of older adults, during degenerative, infectious, vascular, inflammatory, tumoral, toxic and metabolic disorders.
Poster: "ECR 2010 / C-2801 / Intracranial high T1 signal: A pictorial essay" by: "... more Poster: "ECR 2010 / C-2801 / Intracranial high T1 signal: A pictorial essay" by: "S. El Rai1, J.-Y. Tanguy1, M. S. Hlomaschi2; 1Angers/FR, 2Maubeuge/FR"
Proceedings of Spie the International Society For Optical Engineering, Mar 1, 2011
This paper presents a novel study investigating the influences of Magnetic Resonance (MR) image a... more This paper presents a novel study investigating the influences of Magnetic Resonance (MR) image anatomical information and observer expertise on an abnormality detection task. MRI is exquisitely sensitive for detecting brain abnormalities, particularly in the evaluation of white matter diseases, e.g. multiple sclerosis (MS). For this reason, MS lesions are simulated as the target stimuli for detection in the present
Compression of Biomedical Images and Signals, 2008
Page 1. Chapter 3 Specificities of Physiological Signals and Medical Images 3.1. Introduction Thi... more Page 1. Chapter 3 Specificities of Physiological Signals and Medical Images 3.1. Introduction This chapter will broadly cover the specific features of the signals and images most commonly used in clinical procedures. Of course ...
Proceedings of Spie the International Society For Optical Engineering, Mar 1, 2010
ABSTRACT MRI} is an essential tool for brain glioma diagnosis thanks to its ability to produce im... more ABSTRACT MRI} is an essential tool for brain glioma diagnosis thanks to its ability to produce images in any layout plan and to its numerous sequences adapted to both anatomic and functional imaging. {I}n this paper, we investigate the use of an eyetracking system to explore relationships between visual scanning patterns and the glioma diagnostic process during brain {MRI} analysis. {W}e divide the analyzed screen into {A}reas of {I}nterest ({AOI}s), each {AOI} corresponding to one sequence. {A}nalyzing temporal organization of fixation location intra {AOI} and inter {AOI} splits the diagnostic process into different steps. {T}he analysis of saccadic amplitudes reveals clear delineation of three sequential steps. {D}uring the first step (characterized by large saccades), a radiologist performs a short review on all sequences and on the patient report. {I}n the second step (characterized by short saccades), a radiologist sequentially and systematically scans all the slices of each sequence. {T}he fixation duration in one {AOI} depends on the number of slices, on the lesion subtlety and on the lesion contrast in the sequence to be analyzed. {I}n order to improve the detection, localization and characterization of the glioma, the radiologist compares sequences during the third step (characterized by large saccades). {E}ye-position recording enables one to identify each elementary task implemented during diagnostic process of glioma detection and characterization on brain {MRI}. {T}otal dwell time associated with one {MRI} sequence (one {AOI}) and contrast in primary lesion area enable one to estimate the amount and subtleties of diagnosis criteria provided by the sequence. {F}rom this information, one could establish some rules to optimize brain {MRI} compression (depending on the sequence to be compressed).
Compression of Biomedical Images and Signals, 2008
... medical data, the space required to house such equipment, the time taken to transfer data and... more ... medical data, the space required to house such equipment, the time taken to transfer data and ... of time physicians spend physically organizing the images, whether these images are on film or CD ... systems have increased in recent years, yet they remain limited: to 10 GB per DVD. ...
Journal of Neuroradiology, 2020
Breast screening in the UK has been implemented for over 20 years and annually nearly two million... more Breast screening in the UK has been implemented for over 20 years and annually nearly two million women are now screened with an estimated 1,400 lives saved. Nationally, some 700 individuals interpret screening mammograms in almost 110 screening centres. Currently, ...
Gériatrie et Psychologie Neuropsychiatrie du Viellissement, 2020
Clinical Neurology and Neurosurgery, 2008
La compression d'images represente une alternative de faible cout a l'augmentation system... more La compression d'images represente une alternative de faible cout a l'augmentation systematique de la capacite de stockage des systemes d'archivage et des lignes de transmission (PACS). Afin d'etudier les effets de la compression irreversible par ondelettes (base de la norme JPEG2000) sur des radiographies thoraciques d'emblee numeriques (Thoravision®), nous avons defini un protocole complet d'evaluation. Les taux de compression de 20:1, 40:1, 60:1 ont ete evalues en double aveugle par 3 radiologues dans des conditions standardisees sur des structures anatomiques (suivant 11 criteres portant sur les details, les contours et les artefacts sur une population de 30 sujets sains) et pathologiques (pneumothorax et syndromes interstitiels). Des courbes ROC ont ete realisees a partir de deux populations de 20 patients. Notre etude determine un taux de compression acceptable a 20:1 pour les radiographies normales et 60:1 pour les images pathologiques. L'interpret...
Geriatrie et psychologie neuropsychiatrie du vieillissement, 2019
The hippocampus is a small internal temporal cerebral structure, which plays a primordial role in... more The hippocampus is a small internal temporal cerebral structure, which plays a primordial role in the mechanisms of memory. Magnetic resonance imaging (MRI) is the reference imaging modality for the hippocampal analysis. In older adults, dementia represents the majority of hippocampal diseases, but other specific pathologies must be known in the differential diagnosis. Many hippocampal abnormalities are represented by a loss of substance (atrophy). However, most acute or recent hippocampal damage is detected by MRI signal abnormalities. The aim of this article is to offer a pictorial review of the normal and pathological hippocampal aspects of older adults, during degenerative, infectious, vascular, inflammatory, tumoral, toxic and metabolic disorders.
Poster: "ECR 2010 / C-2801 / Intracranial high T1 signal: A pictorial essay" by: "... more Poster: "ECR 2010 / C-2801 / Intracranial high T1 signal: A pictorial essay" by: "S. El Rai1, J.-Y. Tanguy1, M. S. Hlomaschi2; 1Angers/FR, 2Maubeuge/FR"
Proceedings of Spie the International Society For Optical Engineering, Mar 1, 2011
This paper presents a novel study investigating the influences of Magnetic Resonance (MR) image a... more This paper presents a novel study investigating the influences of Magnetic Resonance (MR) image anatomical information and observer expertise on an abnormality detection task. MRI is exquisitely sensitive for detecting brain abnormalities, particularly in the evaluation of white matter diseases, e.g. multiple sclerosis (MS). For this reason, MS lesions are simulated as the target stimuli for detection in the present
Compression of Biomedical Images and Signals, 2008
Page 1. Chapter 3 Specificities of Physiological Signals and Medical Images 3.1. Introduction Thi... more Page 1. Chapter 3 Specificities of Physiological Signals and Medical Images 3.1. Introduction This chapter will broadly cover the specific features of the signals and images most commonly used in clinical procedures. Of course ...
Proceedings of Spie the International Society For Optical Engineering, Mar 1, 2010
ABSTRACT MRI} is an essential tool for brain glioma diagnosis thanks to its ability to produce im... more ABSTRACT MRI} is an essential tool for brain glioma diagnosis thanks to its ability to produce images in any layout plan and to its numerous sequences adapted to both anatomic and functional imaging. {I}n this paper, we investigate the use of an eyetracking system to explore relationships between visual scanning patterns and the glioma diagnostic process during brain {MRI} analysis. {W}e divide the analyzed screen into {A}reas of {I}nterest ({AOI}s), each {AOI} corresponding to one sequence. {A}nalyzing temporal organization of fixation location intra {AOI} and inter {AOI} splits the diagnostic process into different steps. {T}he analysis of saccadic amplitudes reveals clear delineation of three sequential steps. {D}uring the first step (characterized by large saccades), a radiologist performs a short review on all sequences and on the patient report. {I}n the second step (characterized by short saccades), a radiologist sequentially and systematically scans all the slices of each sequence. {T}he fixation duration in one {AOI} depends on the number of slices, on the lesion subtlety and on the lesion contrast in the sequence to be analyzed. {I}n order to improve the detection, localization and characterization of the glioma, the radiologist compares sequences during the third step (characterized by large saccades). {E}ye-position recording enables one to identify each elementary task implemented during diagnostic process of glioma detection and characterization on brain {MRI}. {T}otal dwell time associated with one {MRI} sequence (one {AOI}) and contrast in primary lesion area enable one to estimate the amount and subtleties of diagnosis criteria provided by the sequence. {F}rom this information, one could establish some rules to optimize brain {MRI} compression (depending on the sequence to be compressed).
Compression of Biomedical Images and Signals, 2008
... medical data, the space required to house such equipment, the time taken to transfer data and... more ... medical data, the space required to house such equipment, the time taken to transfer data and ... of time physicians spend physically organizing the images, whether these images are on film or CD ... systems have increased in recent years, yet they remain limited: to 10 GB per DVD. ...