Jaume Palmer - Academia.edu (original) (raw)
Papers by Jaume Palmer
American Journal of Roentgenology, Feb 1, 2002
PURPOSE/AIM 1. Describe the technique of data acquisition on a 3-T MRI system. 2. Discuss the rel... more PURPOSE/AIM 1. Describe the technique of data acquisition on a 3-T MRI system. 2. Discuss the relationship of fractional anisotrophy (FA) and apparent diffusion coeficient (ADC) values between normal and pathologic cases. 3. Illustrate with comparative examples, the normal anatomy and the most frequent median nerve pathology of the wrist. CONTENT ORGANIZATION The exhibit includes: 1- Diffusion Tensor Imaging at 3T MR imaging: principles. 2- The normal median nerve: normal appearance. 3- Fractional anisotrophy (FA) and apparent diffusion coeficient (ADC) of the normal median nerve. 4- Pathologic conditions involving the median nerve: carpal tunnel syndrome, fibrolipomatous hamartoma. SUMMARY 3-T MR imaging “DTI” and tractography can be helpful in evaluation and diagnosis of different neuropathies of the wrist involving median nerve. At the end of this educational exhibit, the reader will be able to recognise normal and pathologic behavior using this technique.
PURPOSE/AIM 1. To be familiar with radiological findings of intra-articular soft tissue tumors. 2... more PURPOSE/AIM 1. To be familiar with radiological findings of intra-articular soft tissue tumors. 2. To emphasize typical and key magnetic resonance (MR) features for diagnosing these conditions. 3. To correlate the imaging findings with pathology. CONTENT ORGANIZATION General overview Benign tumors: - Synovial hemangioma: MR features; solitary and diffuse types; bone involvement; pathologic correlation. - Lipoma arborescens: MR features; association with degenerative joint disease; pathologic correlation. - Synovial chondroma: radiologic and MR features; pathologic correlation. - GCTTS and PVNS: types, MR features. - Ganglia Malignant tumors: Examples of intra-articular synovial sarcoma, liposarcoma, chondrosarcoma, Ewing, and metastases. SUMMARY This exhibit illustrates a spectrum of benign and malignant intra-articular tumors. This includes, among others, synovial hemangioma, lipoma arborescens, chondroma, giant cell tumor of the tendon sheath, ganglia, synovial sarcoma, liposarcom...
AJR. American journal of roentgenology, 2002
Revista Española de Cardiología, 2001
ABSTRACT Aim of the study Echocardiography is a widely applied technique for the estimation of le... more ABSTRACT Aim of the study Echocardiography is a widely applied technique for the estimation of left ventricular mass, although magnetic resonance is considered as a reference method for this purpose. Both techniques were compared in the present study and the usefulness of a simplified method of calculation by magnetic resonance was also tested. Methods Left ventricular mass was determined in 42 patients by M-mode echocardiography by the application of two equations: the so-called Penn's convention and that proposed by the American Society of Echocardiography. Magnetic resonance studies were also performed, left ventricular mass being estimated from an anatomical method (summation of contiguous tranverse ventricular slices) that was considered as a reference, and also by means of a geometrical method (planimetry on a single longitudinal view). Results Echocardiographic studies were judged as technically inadequate in 3/42 (7%) patients, while magnetic resonance was performed in all cases. Comparison between each echocardiographic method and the anatomical method of magnetic resonance showed a coefficient correlation of r = 0.70 (Penn's convention formula), and r = 0.71 (American Society of Echocardiography), with an overestimation being observed, particularly with Penn's convention method. The geometrical method of magnetic resonance showed an excellent correlation with the anatomical technique (r = 0.93). Conclusions Magnetic resonance is more applicable for the estimation of left ventricular mass than M-mode echocardiography, with the latter showing an overestimation when compared with magnetic resonance, particularly with the Penn's convention method. A simplified method of geometrical estimation of left ventricular mass by magnetic resonance is a reliable alternative to the anatomical method.
Cirugía Española, 2012
Mujer de 76 añ os, intervenida hacía 8 días de colecistectomía laparoscó pica sin incidencias por... more Mujer de 76 añ os, intervenida hacía 8 días de colecistectomía laparoscó pica sin incidencias por colecistitis aguda flemonosa litiá sica, acude a urgencias por dolor abdominal, ictericia y fiebre. La ecografía abdominal evidencia una vía biliar extrahepá tica no dilatada, sin imá genes sugestivas de litiasis en su interior.
Cirugía Española, 2013
Varó n de 65 añ os, ingresado de urgencias por una pancreatitis aguda litiá sica grave asociada c... more Varó n de 65 añ os, ingresado de urgencias por una pancreatitis aguda litiá sica grave asociada con colangitis por lo que se realizó una colangiopancreatografía endoscó pica retró grada con esfinterotomía y extracció n de litiasis coledocal mú ltiple.
Skeletal Radiology, 1995
The findings in two patients with histologically proven synovial hemangioma of the knee are descr... more The findings in two patients with histologically proven synovial hemangioma of the knee are described. Both cases emphasize the typical appearance of this unusual tumor on magnetic resonance imaging. Additional radiologic findings, such as adjacent osseous involvement, are discussed.
Skeletal Radiology, 2002
Focal myositis is a commonly referenced, infrequently reported and poorly documented benign infla... more Focal myositis is a commonly referenced, infrequently reported and poorly documented benign inflammatory pseudotumor which may be misdiagnosed clinically as a malignant tumor. We report the clinicopathologic features and magnetic resonance imaging findings in a case of focal myositis in the thigh of a 55-year-old woman. A different radiologic presentation of this disorder is described. The gross appearance of the lesion, previously undescribed, appears to be rather specific for such a pseudoneoplastic disorder, and correlates very well with the magnetic resonance imaging features.
Skeletal Radiology, 2008
Meningiomas account for approximately 15% of all intracranial tumors and are the most common nong... more Meningiomas account for approximately 15% of all intracranial tumors and are the most common nonglial primary tumors of the central nervous system. Most meningiomas are benign neoplasms with characteristic imaging features. Primary extradural meningiomas account for only 1-2% of all meningiomas. They must be differentiated from intradural meningiomas with secondary extradural extension and/or metastases. The vast majority of extradural meningiomas are found in the skull or in the head and neck region. We report on an extremely rare case of primary extradural meningioma that was located in the scapula. The lesion was resected. Radiographic findings and pathologic features are discussed. To the best of our knowledge, this form of presentation of an extradural meningioma has not been previously described.
Journal of Computer Assisted Tomography, 1990
We describe a rare anomaly demonstrated by CT in which the right brachiocephalic vein follows an ... more We describe a rare anomaly demonstrated by CT in which the right brachiocephalic vein follows an extramediastinal course in the anterior portion of the azygos fissure.
Annals of Neurology, 2001
Herpes simplex encephalitis is a severe neurological disease with high mortality and morbidity ra... more Herpes simplex encephalitis is a severe neurological disease with high mortality and morbidity rates. Reactivated herpes simplex virus type 1 (HSV-1) can cause relapses and might even spread to the retina, where it can induce a potentially blinding eye disease, known as acute retinal necrosis. In the present study, the HSV-1 strains in the brain and eye of 2 patients with acute retinal necrosis following an episode of herpes simplex encephalitis were genotyped. The HSV-1 strains in both the brain and eye were identical in each patient, but they differed interindividually. The data suggest brain-to-eye transmission of HSV-1 in these patients.
American Journal of Roentgenology, 2002
Radiographics, 2000
Diagnosis of septic arthritis requires aspiration and analysis of joint fluid. However, nonseptic... more Diagnosis of septic arthritis requires aspiration and analysis of joint fluid. However, nonseptic articular disorders are fairly common and represent a significant diagnostic and therapeutic challenge. Such disorders include gout, Milwaukee shoulder, rapidly destructive articular disease, amyloid arthropathy, hemophilic arthropathy, primary synovial osteochondromatosis, pigmented villonodular synovitis, neuropathic arthropathy, and foreign-body synovitis. The clinical signs of articular disease, which include pain, swelling, and limitation of motion, are often nonspecific and can overlap with those of osseous or extraarticular disorders. Many articular processes have characteristic radiologic appearances that allow definitive diagnosis. Radiography is an important part of the evaluation of patients with articular disease. However, magnetic resonance (MR) imaging is the method of choice for characterizing the various disorders and assessing the full extent of osseous, chondral, and soft-tissue involvement. MR imaging can exquisitely demonstrate joint effusions, synovial proliferation, articular cartilage abnormalities, subchondral bone, ligaments, muscles, and juxtaarticular soft tissues. Although a wide spectrum of noninfectious processes may involve the joints, careful analysis of the imaging findings and correlation of these findings with the patient's clinical history can suggest a more specific diagnosis in most cases. Awareness and understanding of the underlying histopathologic findings aids in interpretation of MR images.
The American Journal of Cardiology, 1997
To compare the value of echocardiography and magnetic resonance imaging (MRI) in the assessment o... more To compare the value of echocardiography and magnetic resonance imaging (MRI) in the assessment of the amount and extent of hypertrophy in hypertrophic cardiomyopathy (HC) and, second, to correlate the degree of hypertrophy, as assessed by MRI, with clinical and electrocardiographic parameters, 30 consecutive patients (16 men and 14 women, aged 20 to 74 years) with HC were studied. Measurements of left ventricular wall thickness were performed at 11 predetermined segments (5 basal, 5 midventricular, and 1 apical) by 2-dimensional echocardiography and MRI. Two parameters derived from MRI studies were considered as indicators of the degree and extent of hypertrophy: (1) mean of the measured wall thickness at the 11 segments, and (2) the number of segments with thickness > 15 mm. Results showed that, from a total of 330 myocardial segments, thickness could be measured by echocardiography in 221 (67%), whereas MRI allowed measurement of 320 segments (97%). When compared with clinical and electrocardiographic data, no correlation was found regarding mean wall thickness and number of hypertrophied segments by MRI except for the presence of an abnormal electrocardiographic repolarization pattern. It is concluded that MRI allows a better assessment of the degree and extension of left ventricular hypertrophy than echocardiography in HC. Despite the precise information on hypertrophy provided by MRI, the amount and degree of hypertrophy bears no correlation with most of the clinical data in these patients.
American Journal of Roentgenology, Feb 1, 2002
PURPOSE/AIM 1. Describe the technique of data acquisition on a 3-T MRI system. 2. Discuss the rel... more PURPOSE/AIM 1. Describe the technique of data acquisition on a 3-T MRI system. 2. Discuss the relationship of fractional anisotrophy (FA) and apparent diffusion coeficient (ADC) values between normal and pathologic cases. 3. Illustrate with comparative examples, the normal anatomy and the most frequent median nerve pathology of the wrist. CONTENT ORGANIZATION The exhibit includes: 1- Diffusion Tensor Imaging at 3T MR imaging: principles. 2- The normal median nerve: normal appearance. 3- Fractional anisotrophy (FA) and apparent diffusion coeficient (ADC) of the normal median nerve. 4- Pathologic conditions involving the median nerve: carpal tunnel syndrome, fibrolipomatous hamartoma. SUMMARY 3-T MR imaging “DTI” and tractography can be helpful in evaluation and diagnosis of different neuropathies of the wrist involving median nerve. At the end of this educational exhibit, the reader will be able to recognise normal and pathologic behavior using this technique.
PURPOSE/AIM 1. To be familiar with radiological findings of intra-articular soft tissue tumors. 2... more PURPOSE/AIM 1. To be familiar with radiological findings of intra-articular soft tissue tumors. 2. To emphasize typical and key magnetic resonance (MR) features for diagnosing these conditions. 3. To correlate the imaging findings with pathology. CONTENT ORGANIZATION General overview Benign tumors: - Synovial hemangioma: MR features; solitary and diffuse types; bone involvement; pathologic correlation. - Lipoma arborescens: MR features; association with degenerative joint disease; pathologic correlation. - Synovial chondroma: radiologic and MR features; pathologic correlation. - GCTTS and PVNS: types, MR features. - Ganglia Malignant tumors: Examples of intra-articular synovial sarcoma, liposarcoma, chondrosarcoma, Ewing, and metastases. SUMMARY This exhibit illustrates a spectrum of benign and malignant intra-articular tumors. This includes, among others, synovial hemangioma, lipoma arborescens, chondroma, giant cell tumor of the tendon sheath, ganglia, synovial sarcoma, liposarcom...
AJR. American journal of roentgenology, 2002
Revista Española de Cardiología, 2001
ABSTRACT Aim of the study Echocardiography is a widely applied technique for the estimation of le... more ABSTRACT Aim of the study Echocardiography is a widely applied technique for the estimation of left ventricular mass, although magnetic resonance is considered as a reference method for this purpose. Both techniques were compared in the present study and the usefulness of a simplified method of calculation by magnetic resonance was also tested. Methods Left ventricular mass was determined in 42 patients by M-mode echocardiography by the application of two equations: the so-called Penn's convention and that proposed by the American Society of Echocardiography. Magnetic resonance studies were also performed, left ventricular mass being estimated from an anatomical method (summation of contiguous tranverse ventricular slices) that was considered as a reference, and also by means of a geometrical method (planimetry on a single longitudinal view). Results Echocardiographic studies were judged as technically inadequate in 3/42 (7%) patients, while magnetic resonance was performed in all cases. Comparison between each echocardiographic method and the anatomical method of magnetic resonance showed a coefficient correlation of r = 0.70 (Penn's convention formula), and r = 0.71 (American Society of Echocardiography), with an overestimation being observed, particularly with Penn's convention method. The geometrical method of magnetic resonance showed an excellent correlation with the anatomical technique (r = 0.93). Conclusions Magnetic resonance is more applicable for the estimation of left ventricular mass than M-mode echocardiography, with the latter showing an overestimation when compared with magnetic resonance, particularly with the Penn's convention method. A simplified method of geometrical estimation of left ventricular mass by magnetic resonance is a reliable alternative to the anatomical method.
Cirugía Española, 2012
Mujer de 76 añ os, intervenida hacía 8 días de colecistectomía laparoscó pica sin incidencias por... more Mujer de 76 añ os, intervenida hacía 8 días de colecistectomía laparoscó pica sin incidencias por colecistitis aguda flemonosa litiá sica, acude a urgencias por dolor abdominal, ictericia y fiebre. La ecografía abdominal evidencia una vía biliar extrahepá tica no dilatada, sin imá genes sugestivas de litiasis en su interior.
Cirugía Española, 2013
Varó n de 65 añ os, ingresado de urgencias por una pancreatitis aguda litiá sica grave asociada c... more Varó n de 65 añ os, ingresado de urgencias por una pancreatitis aguda litiá sica grave asociada con colangitis por lo que se realizó una colangiopancreatografía endoscó pica retró grada con esfinterotomía y extracció n de litiasis coledocal mú ltiple.
Skeletal Radiology, 1995
The findings in two patients with histologically proven synovial hemangioma of the knee are descr... more The findings in two patients with histologically proven synovial hemangioma of the knee are described. Both cases emphasize the typical appearance of this unusual tumor on magnetic resonance imaging. Additional radiologic findings, such as adjacent osseous involvement, are discussed.
Skeletal Radiology, 2002
Focal myositis is a commonly referenced, infrequently reported and poorly documented benign infla... more Focal myositis is a commonly referenced, infrequently reported and poorly documented benign inflammatory pseudotumor which may be misdiagnosed clinically as a malignant tumor. We report the clinicopathologic features and magnetic resonance imaging findings in a case of focal myositis in the thigh of a 55-year-old woman. A different radiologic presentation of this disorder is described. The gross appearance of the lesion, previously undescribed, appears to be rather specific for such a pseudoneoplastic disorder, and correlates very well with the magnetic resonance imaging features.
Skeletal Radiology, 2008
Meningiomas account for approximately 15% of all intracranial tumors and are the most common nong... more Meningiomas account for approximately 15% of all intracranial tumors and are the most common nonglial primary tumors of the central nervous system. Most meningiomas are benign neoplasms with characteristic imaging features. Primary extradural meningiomas account for only 1-2% of all meningiomas. They must be differentiated from intradural meningiomas with secondary extradural extension and/or metastases. The vast majority of extradural meningiomas are found in the skull or in the head and neck region. We report on an extremely rare case of primary extradural meningioma that was located in the scapula. The lesion was resected. Radiographic findings and pathologic features are discussed. To the best of our knowledge, this form of presentation of an extradural meningioma has not been previously described.
Journal of Computer Assisted Tomography, 1990
We describe a rare anomaly demonstrated by CT in which the right brachiocephalic vein follows an ... more We describe a rare anomaly demonstrated by CT in which the right brachiocephalic vein follows an extramediastinal course in the anterior portion of the azygos fissure.
Annals of Neurology, 2001
Herpes simplex encephalitis is a severe neurological disease with high mortality and morbidity ra... more Herpes simplex encephalitis is a severe neurological disease with high mortality and morbidity rates. Reactivated herpes simplex virus type 1 (HSV-1) can cause relapses and might even spread to the retina, where it can induce a potentially blinding eye disease, known as acute retinal necrosis. In the present study, the HSV-1 strains in the brain and eye of 2 patients with acute retinal necrosis following an episode of herpes simplex encephalitis were genotyped. The HSV-1 strains in both the brain and eye were identical in each patient, but they differed interindividually. The data suggest brain-to-eye transmission of HSV-1 in these patients.
American Journal of Roentgenology, 2002
Radiographics, 2000
Diagnosis of septic arthritis requires aspiration and analysis of joint fluid. However, nonseptic... more Diagnosis of septic arthritis requires aspiration and analysis of joint fluid. However, nonseptic articular disorders are fairly common and represent a significant diagnostic and therapeutic challenge. Such disorders include gout, Milwaukee shoulder, rapidly destructive articular disease, amyloid arthropathy, hemophilic arthropathy, primary synovial osteochondromatosis, pigmented villonodular synovitis, neuropathic arthropathy, and foreign-body synovitis. The clinical signs of articular disease, which include pain, swelling, and limitation of motion, are often nonspecific and can overlap with those of osseous or extraarticular disorders. Many articular processes have characteristic radiologic appearances that allow definitive diagnosis. Radiography is an important part of the evaluation of patients with articular disease. However, magnetic resonance (MR) imaging is the method of choice for characterizing the various disorders and assessing the full extent of osseous, chondral, and soft-tissue involvement. MR imaging can exquisitely demonstrate joint effusions, synovial proliferation, articular cartilage abnormalities, subchondral bone, ligaments, muscles, and juxtaarticular soft tissues. Although a wide spectrum of noninfectious processes may involve the joints, careful analysis of the imaging findings and correlation of these findings with the patient's clinical history can suggest a more specific diagnosis in most cases. Awareness and understanding of the underlying histopathologic findings aids in interpretation of MR images.
The American Journal of Cardiology, 1997
To compare the value of echocardiography and magnetic resonance imaging (MRI) in the assessment o... more To compare the value of echocardiography and magnetic resonance imaging (MRI) in the assessment of the amount and extent of hypertrophy in hypertrophic cardiomyopathy (HC) and, second, to correlate the degree of hypertrophy, as assessed by MRI, with clinical and electrocardiographic parameters, 30 consecutive patients (16 men and 14 women, aged 20 to 74 years) with HC were studied. Measurements of left ventricular wall thickness were performed at 11 predetermined segments (5 basal, 5 midventricular, and 1 apical) by 2-dimensional echocardiography and MRI. Two parameters derived from MRI studies were considered as indicators of the degree and extent of hypertrophy: (1) mean of the measured wall thickness at the 11 segments, and (2) the number of segments with thickness > 15 mm. Results showed that, from a total of 330 myocardial segments, thickness could be measured by echocardiography in 221 (67%), whereas MRI allowed measurement of 320 segments (97%). When compared with clinical and electrocardiographic data, no correlation was found regarding mean wall thickness and number of hypertrophied segments by MRI except for the presence of an abnormal electrocardiographic repolarization pattern. It is concluded that MRI allows a better assessment of the degree and extension of left ventricular hypertrophy than echocardiography in HC. Despite the precise information on hypertrophy provided by MRI, the amount and degree of hypertrophy bears no correlation with most of the clinical data in these patients.