Servicio de Medicina Nuclear
Servicio de Medicina Nuclear
Anzola Fuentes L.K.,Servicio de Medicina Nuclear |
Cortes German G.H.,Medicina Nuclear |
Revista Colombiana de Reumatologia | Year: 2017
Introduction: Bone and joint disease has a high incidence and impact on the population. The bone scan is a diagnostic tool that provides important metabolic and clinical information, therefore the interpretation of the images by the nuclear medicine physician must be very precise. The isotopic distribution pattern in hands has not yet been described. For this reason a description is presented of common scintigraphic findings in adults without osteoarticular disease. Materials and methods: A prospective analysis was conducted on 156 hands of patients whose bone scans met inclusion criteria. There were delineated regions of interest in the carpal, metacarpal, proximal, and distal interphalangeal joints of the second and third fingers of both hands. An analysis was made, including the total counts, means, and standard deviations. The cut-offs were selected using the normal distribution, which was defined as the cut at the 99th percentile of each variable. A semi-quantitative analysis was made of the images. Results: The study included 36 men (23%) and 119 women (77%), and the mean age was 44.9 ± 13.9. The mean total counts gradually decreased from proximal to distal in all age groups and in both genders in the following proportions: the activity in carpus was 4.4 fold more than the metacarpus; the metacarpus was 1.7 fold more than proximal interphalangeal joint; proximal interphalangeal joint was 1.4 fold more than distal one. Conclusions: A scintigraphic pattern consisting of a gradual decrease from proximal to distal joints (degradation) was found in the hands of adults without bone and joint disease, regardless of gender and age. © 2016 Asociación Colombiana de Reumatología. Published by Elsevier España, S.L.U. All rights reserved.
Simultaneous analysis of two-dimensional strain, coronary flow reserve and wall motion during dipyridamole stress echocardiography. Comparative outcomes [Análisis simultáneo del strain 2D, de la reserva coronaria y de la contractilidad parietal durante el eco estrés con dipiridamol. Resultados comparatives]
Lowenstein J.,Servicio de Ecocardiografia |
Daru V.,Servicio de Ecocardiografia |
Amor M.,Servicio de Ecocardiografia |
Carlessi A.,Servicio de Ecocardiografia |
And 4 more authors.
Revista Argentina de Cardiologia | Year: 2010
Background: Dipyridamole stress echocardiography (DSE) is a pharmacological test accepted for the evaluation of patients with ischemic heart disease that has proved to be an ideal method that combines the visual information of wall motion with coronary flow reserve (CFR). However, the usefulness of 2D strain for the diagnosis of myocardial ischemia is still uncertain. In this sense, it seems interesting for daily practice to evaluate the results of this technique and compare them with those of other methods currently used for the evaluation of regional ischemia. Objectives: To compare the results of visual analysis of wall motion and the value of CFR of the left anterior descending (LAD) coronary artery during DSE with 2D longitudinal strain in the same territory, using simultaneous 99mTc-sestamibi SPECT scan as the gold standard for the diagnosis of myocardial ischemia. Material and Methods: We evaluated 41 patients (16 men; average age 68.5 years) referred for DSE. The average 2D longitudinal strain obtained of the 9 segments corresponding to the LAD coronary artery from the three apical views at rest and during stress was estimated. A drop in 2D strain value or an average increase < 5% was considered an ischemic response. Wall motion and CFR in the LAD (normal: >2) were evaluated during the peak effect of 0.84 mg/kg of dipyridamole, when intravenous 99Tc sestamibi was injected and stress SPECT images were obtained. Rest images were acquired at 24 and 48 hours. Results: Three patients were excluded: one due to poor pulsed Doppler signal in the LAD and two patients presented a suboptimal ultrasound window for 2D strain. Twelve patients presented reversible perfusion defects in SPECT images (ischemic response). There was a good correlation in the four parameters evaluated in 6 patients in whom all the studies were abnormal and in 23 patients in whom all the studies were normal. In patients with normal SPECT images, 2D longitudinal strain in the territory of the LAD was -19.9% (-18, -22) at rest and -22.5% (-21, -26) during peak infusion of dipyridamole (p=0.0003). In patients with ischemia, 2D strain was -19.35% (-17, -22) at rest and -20.25% (-13, -21) during peak dipyridamole infusion (p=ns). The sensitivities and specificities obtained were: CFR, 66.7% (CI 95% 35.4-88.7) and 100%, respectively; wall motion, 50% (CI 95% 22.3-77.7) and 100%, respectively; and 2D strain, 83.3% (CI 95% 50.9-97) and 88.5% (CI 95% 68.7-97), respectively. Conclusions: Simultaneous analysis of 2D strain during dipyridamole stress echocardiography proved to be a feasible quantitative method, as effective as CFR and better than the visual wall motion analysis for the diagnosis of ischemia in the territory of the LAD coronary artery.
Saez-De Ocariz M.,Servicio de Dermatologia |
Carrillo-Rincon A.,Servicio de Dermatologia |
Murata C.,Metodologia de la Investigacion |
Gutierrez-Hernandez A.,Servicio de Inmunologia |
And 2 more authors.
Acta Pediatrica de Mexico | Year: 2014
Background: Dystrophic calcinosis is associated with juvenile dermatomyositis and systemic sclerosis. Clinical diagnosis is performed through the detection of subcutaneous, hard nodules. Conventional radiographic studies may demonstrate calcium deposits, however, with very early lesions X-rays may prove insufficient. There are a few studies where scintilliography has been used to identify dystrophic calcinosis. Objectives: To estimate the frequency of dystrophic calcinosis in patients with juvenile dermatomyositis and systemic sclerosis/CREST syndrome. To estimate the concordance between the diagnoses of dystrophic calcinosis obtained by physical examination and scintigraphy. Patients and Methods: Observational, transversal and comparative study in which patients of both genders, between 5 and 7 years of age with the diagnoses of juvenile dermatomyositis and systemic sclerosis/CREST syndrome were included in order to detect dystrophic calcinosis by physical examination and scintigraphy. Fisher's exact test was used to evaluate the association between both diagnostic methods, Kappa test was used to evaluate the level of concordance between both methods and a distribution by group analysis was used to analyze the extent of dystrophic calcinosis with both methods. Sensitivity and specificity for scintigraphic findings in soft tissues, bony protrusions , ribs and vertebrae was also estimated. Results: The frequency of dystrophic calcinosis was 80%. Dystrophic calcinosis was detected through physical examination in 16 patients and through scintigraphy in 9 patients. No association or concordance was found between the clinical and the scintigraphic findings. Scintigraphy has a 37.5% sensitivity for the detection of dystrophic calcinosis in soft tissues and 43.8% in bony protrusions, but is ideal for its detection in the ribs. Conclusions: Both, physicial examination and scintigraphy are complementary tools for the detection of dystrophic calcinosis.
PubMed | Servicio de Medicina Nuclear, New York University, CIBER ISCIII, San Antonio de Murcia Catholic University and 2 more.
Type: | Journal: Nuclear medicine and biology | Year: 2016
Therapeutic application of intravenous administered (IV) human bone marrow-derived mesenchymal stem cells (ahMSCs) appears to have as main drawback the massive retention of cells in the lung parenchyma, questioning the suitability of this via of administration. Intraarticular administration (IAR) could be considered as an alternative route for therapy in degenerative and traumatic joint lesions. Our work is outlined as a comparative study of biodistribution of Isolated primary culture of adult human mesenchymal stem cells was labeled with IV administration of radiolabeled ahMSCs showed the bulk of radioactivity in the lung parenchyma while IAR images showed activity mainly in the injected cavity and complete absence of uptake in pulmonary bed.Our study shows that IAR administration overcomes the limitations of IV injection, in particular, those related to cells destruction in the lung parenchyma. After IAR administration, cells remain within the joint cavity, as expected given its size and adhesion properties.Intra-articular administration of adult human mesenchymal stem cells could be a suitable route for therapeutic effect in joint lesions.Local administration of adult human mesenchymal stem cells could improve their therapeutic effects, minimizing side effects in patients.
Banzo J.,Grupo Hospitalario Quiron |
Ubieto M.A.,Grupo Hospitalario Quiron |
Berisa M.F.,Hospital Obispo Polanco |
Andres A.,Servicio de Medicina Nuclear |
And 5 more authors.
Revista Espanola de Medicina Nuclear e Imagen Molecular | Year: 2013
The widespread use of 18F-FDG PET-CT scanning in oncological patients has allowed to demonstrate the existence of metabolically active brown fat, also called brown adipose tissue (BAT), in adult humans, and specifying its anatomical distribution in vivo. As physiological determinants to BAT 18F-FDG uptake has been identified gender, age, temperature, and body mass index. We have observed extensive activation of the BAT, including the mesenteric region, in a patient with a catecholamine-secreting para-vesical paranganglioma. The extensive BAT activation could be secondary to adrenergic stimulation due to excess of circulating norepinephrine concentration. © 2013 Elsevier España, S.L. and SEMNIM.
Zaknun J.J.,International Atomic Energy Agency |
Rajabi H.,University of Tehran |
Piepsz A.,University Hospital |
Roca I.,Servicio de Medicina Nuclear |
Dondi M.,International Atomic Energy Agency
Seminars in Nuclear Medicine | Year: 2011
Under the auspices of the International Atomic Energy Agency, a new-generation, platform-independent, and x86-compatible software package was developed for the analysis of scintigraphic renal dynamic imaging studies. It provides nuclear medicine professionals cost-free access to the most recent developments in the field. The software package is a step forward towards harmonization and standardization. Embedded functionalities render it a suitable tool for education, research, and for receiving distant expert's opinions. Another objective of this effort is to allow introducing clinically useful parameters of drainage, including normalized residual activity and outflow efficiency. Furthermore, it provides an effective teaching tool for young professionals who are being introduced to dynamic kidney studies by selected teaching case studies. The software facilitates a better understanding through practically approaching different variables and settings and their effect on the numerical results. An effort was made to introduce instruments of quality assurance at the various levels of the program's execution, including visual inspection and automatic detection and correction of patient's motion, automatic placement of regions of interest around the kidneys, cortical regions, and placement of reproducible background region on both primary dynamic and on postmicturition studies. The user can calculate the differential renal function through 2 independent methods, the integral or the Rutland-Patlak approaches. Standardized digital reports, storage and retrieval of regions of interest, and built-in database operations allow the generation and tracing of full image reports and of numerical outputs. The software package is undergoing quality assurance procedures to verify the accuracy and the interuser reproducibility with the final aim of launching the program for use by professionals and teaching institutions worldwide. © 2011 Elsevier Inc. All rights reserved.
Lanchas Alfonso I.,Servicio de Medicina Nuclear |
Miguel Martnez M.B.,Servicio de Medicina Nuclear |
CuezvaGuzmn J.F.,Servicio de Ciruga General |
Ruprez Arribas P.,Servicio de Ciruga General |
And 3 more authors.
Revista Espanola de Medicina Nuclear | Year: 2011
The use of deep (intratumoral, peritumoral) and superficial (subdermal, subareolar) administration is recognized as valid in sentinel lymph node biopsy for breast cancer. Herein, we are presenting a clinical case in which a personalized methodology was a determining factor in axillary staging. Initially, the radiotracer was injected intratumorally guided by ultrasound. The ultrasound scan identified a previously unknown axillary lymphadenopathy, with focal cortical thickening, this being a non-specific ultrasound finding, but with possibility of biopsy. The lymphoscintigraphy did not show uptake in the mentioned node, hence, a second subareolar dose was administered. On this occasion, the lymphoscintigraphy detected drainage to the sentinel node, which was the only one positive for micrometastases. © 2010 Elsevier Españ, S.L. and SEMNIM.
Acea B.,Complexo Hospitalario Universitario |
Calvo Martinez L.,Complexo Hospitalario Universitario |
Antolin Novoa S.,Complexo Hospitalario Universitario |
Albaina Latorre L.,Complexo Hospitalario Universitario |
And 9 more authors.
Cirugia Espanola | Year: 2012
Sentinel lymph node (SLN) biopsy is the standard of practice for assessing axillary spread in clinically node-negative breast cancer patients. On the other hand, axillary lymph node dissection (ALND) is the ideal procedure for patients with SLN metastasis. Different studies over the last few years have suggested that some patients with positive SLN can be treated without ALND. This article presents a literature review carried out by our multidisciplinary group and its strategy for avoiding routine ALND in women with SLN metastases. In this new strategy ALND should not be performed on women with T1 tumours, with 1-2 positive SLN and undergoing breast conservative surgery. On the other hand, ALND would be indicated in those patients with three or more positive SLN, presence of extracapsular invasion, mastectomised women and triple negative subtype or HER2+ tumours that have not received biological treatment with antibodies. © 2011 AEC.
PubMed | Servicio de Medicina Nuclear
Type: Case Reports | Journal: Revista espanola de medicina nuclear | Year: 2011
The use of deep (intratumoral, peritumoral) and superficial (subdermal, subareolar) administration is recognized as valid in sentinel lymph node biopsy for breast cancer. Herein, we are presenting a clinical case in which a personalized methodology was a determining factor in axillary staging. Initially, the radiotracer was injected intratumorally guided by ultrasound. The ultrasound scan identified a previously unknown axillary lymphadenopathy, with focal cortical thickening, this being a non-specific ultrasound finding, but with possibility of biopsy. The lymphoscintigraphy did not show uptake in the mentioned node, hence, a second subareolar dose was administered. On this occasion, the lymphoscintigraphy detected drainage to the sentinel node, which was the only one positive for micrometastases.
PubMed | Servicio de Medicina Nuclear
Type: Case Reports | Journal: Revista espanola de medicina nuclear | Year: 2010
We present the case of a 36-year-old premenopausal woman with a background of surgically-treated cervical neoplasm. She underwent a positron emission tomography-computed tomography (PET-CT) for evaluation of the new appearance of abnormal inguinal lymph nodes. The study showed two hypermetabolic nodules in the pelvic region suggestive of corresponding to an implant and to tumor involvement of the lymph node, respectively. After a clinical evaluation and a new PET-CT scan, it was considered that these uptake foci corresponded to physiological activity of the FDG secondary to ovarian activity in a patient with ovariopexy. This article shows the importance of having complete clinical information about the patients before evaluating the studies. We also present a review of the medical literature on the cervical neoplasm and metabolic behavior of the adnexa in relationship with the menstrual cycle of pre-menopausal women.