BACKGROUND Third epidermoid tumors are a rare finding. The appearance of these tumors often makes them difficult to diagnose, and thus they require multimodality imaging. CASE SUMMARY A 48-year-old male patient report...BACKGROUND Third epidermoid tumors are a rare finding. The appearance of these tumors often makes them difficult to diagnose, and thus they require multimodality imaging. CASE SUMMARY A 48-year-old male patient reported to our hospital with complaints of vomiting and severe headache. The patient also complained of involuntary micturition for the past five days. We used a combination of computed tomography (CT) and magnetic resonance imaging (MRI) imaging modalities to confirm the presence of a malignant epidermoid cyst arising from the third ventricle. A contrastenhanced CT of the head demonstrated minimal perilesional enhancement while an MRI revealed a large, lobulated and septated T2 hyperintense mass arising from the third ventricle. The maximum size of the lesion measured 73 mm × 65 mm × 64 mm in size. CONCLUSION Malignant epidermoid arising from the third ventricle in an adult male was reported using a combination of CT, MRI, and MR spectroscopy.展开更多
Cardiovascular magnetic resonance (CMR) has become a reference standard for the measure-ment of cardiac volumes, function, and mass. This study aims to reconstruct three dimen-sional modeling of the left ventricle (LV...Cardiovascular magnetic resonance (CMR) has become a reference standard for the measure-ment of cardiac volumes, function, and mass. This study aims to reconstruct three dimen-sional modeling of the left ventricle (LV) in pa-tients with heart failure (HF) using CMRtools and thereby derive the LV functional indices. CMR images were acquired in 41 subjects (6 females) with heart failure (HF) and 12 normal controls (4 females). Five comparisons were made (i) nor-mal and dilated heart failure subjects, (ii) male and female normal heart, (iii) male and female dilated heart, (iv) male normal and dilated heart failure and (v) female normal and dilated heart failure. In HF, a significant higher values of EDV (320 刡 79 vs. 126 刡 22 ml, P<0.0001), ESV (255 刡 68 vs. 54 刡 12 ml, P<0.00001) and lower values of EF (20 刡 7 vs. 58 刡 5 %) were found compared that of normal control. There were significant difference on LV EDV and ESV between sex in both normal and HF subjects.展开更多
Deep neural networks(DNNs)have been extensively studied in medical image segmentation.However,existing DNNs often need to train shape models for each object to be segmented,which may yield results that violate cardiac...Deep neural networks(DNNs)have been extensively studied in medical image segmentation.However,existing DNNs often need to train shape models for each object to be segmented,which may yield results that violate cardiac anatomical structure when segmenting cardiac magnetic resonance imaging(MRI).In this paper,we propose a capsulebased neural network,named Seg-CapNet,to model multiple regions simultaneously within a single training process.The Seg-CapNet model consists of the encoder and the decoder.The encoder transforms the input image into feature vectors that represent objects to be segmented by convolutional layers,capsule layers,and fully-connected layers.And the decoder transforms the feature vectors into segmentation masks by up-sampling.Feature maps of each down-sampling layer in the encoder are connected to the corresponding up-sampling layers,which are conducive to the backpropagation of the model.The output vectors of Seg-CapNet contain low-level image features such as grayscale and texture,as well as semantic features including the position and size of the objects,which is beneficial for improving the segmentation accuracy.The proposed model is validated on the open dataset of the Automated Cardiac Diagnosis Challenge 2017(ACDC 2017)and the Sunnybrook Cardiac Magnetic Resonance Imaging(MRI)segmentation challenge.Experimental results show that the mean Dice coefficient of Seg-CapNet is increased by 4.7%and the average Hausdorff distance is reduced by 22%.The proposed model also reduces the model parameters and improves the training speed while obtaining the accurate segmentation of multiple regions.展开更多
Neurocysticercosis(NCC) is one of the seven neglected endemic zoonoses targeted by the World Health Organization.It is considered a common infection of the nervous system caused by the Tanenia solium and is known to b...Neurocysticercosis(NCC) is one of the seven neglected endemic zoonoses targeted by the World Health Organization.It is considered a common infection of the nervous system caused by the Tanenia solium and is known to be the primary cause of preventable epilepsy in many developing countries.NCC is commonly resulted by the ingestion of Tanenia solium eggs after consuming undercooked pork,or contaminated water.The parasite can grow in the brain and spinal cord within the nervous system,causing severe headache and seizures beside other pathological manifestations.Immigration and international travel to endemic countries has made this disease common in the United States.NCC can be diagnosed with computed tomography and magnetic resonance imaging of the brain.The treatment of the NCC including cysticidal drugs(eg.,albendazole and praziquantel),and neurosurgical procedure,depending upon a the situation.A patient of Asian origin came to our clinic with complaints of dizziness,headaches and episodes seizures for the past twelve years without proper diagnosis.The computed tomography and magnetic resonance imaging scans indicated multilobulated cystic mass in the brain with the suspicion of neurocysticercosis.展开更多
Background:Many neurophysiological diseases during infancy stage are associated with the morphology and size of the lateral ventricle.This research aims to measure the normal value range of lateral ventricle volume of...Background:Many neurophysiological diseases during infancy stage are associated with the morphology and size of the lateral ventricle.This research aims to measure the normal value range of lateral ventricle volume of normal infant and thus provide basic data for clinical treatment.Method:By retrospective analysis of magnetic resonance inspection (MRI) cranial image of 165 infants in the Department of Pediatric Neurosurgery,Beijing Tiantan Hospital,the infants were divided into four groups according to their age,including the first group (1~3 month,n =12),the second group (4~6 month,n =33),the third group (7~9 month,n =51),and the fourth group (10~12 month,n =69).On Neurosoft image workstation,it can measure the sectional area of the lateral ventricle volume at each layer of axis T2W image and calculate the lateral ventricle volume using the Cavalieri method.Moreover,the correlations between lateral ventricle volume and gender,side difference,and month age were analyzed.Results:95% confidence interval of total bilateral ventricle volume of normal infant:11920.22~14,266.28 mm3 for male infant and 9922.22~12,263.17 mm3 for female infant;95% confidence interval of left side ventricle volume:6254.72~7546.94 mm3 for male infant and 5206.03~6479.99 mm3 for female infant;95% confidence interval of right side ventricle volume:5041.56~6743.29 mm3 for male infant and 4695.00~5804.40 mm3 for female infant.The lateral ventricle volume of the male infant was normally larger than that of the female infant (p < 0.05).For both male and female infants,the left side ventricle volume was larger than the right ventricle volume (p < 0.01).There was no significant difference in lateral ventricle volume between infants over 3 months old.Conclusion:The normal value range of lateral ventricle volume of the infant can be obtained via referring MRI image.The lateral ventricle volume of infant varies upon gender and ventricle side.展开更多
BACKGROUND Isolated left ventricular apical hypoplasia(ILVAH),also known as truncated left ventricle(LV),is a very unusual cardiomyopathy.It is characterised by a truncated,spherical,and non-apex forming LV.The true a...BACKGROUND Isolated left ventricular apical hypoplasia(ILVAH),also known as truncated left ventricle(LV),is a very unusual cardiomyopathy.It is characterised by a truncated,spherical,and non-apex forming LV.The true apex is occupied by the right ventricle.Due to the rarity of the disease,just a few case reports and limited case series have been published in the field.AIM To analysing the so far 37 reported ILVAH cases worldwide.METHODS The electronic databases PubMed and Scopus were investigated from their establishment up to December 13,2022.RESULTS The majority of cases reported occurred in males(52.7%).Mean age at diagnosis was 26.1±19.6 years.More than a third of the patients were asymptomatic(35.1%).The most usual clinical presentation was breathlessness(40.5%).The most commonly detected electrocardiogram changes were T wave abnormalities(29.7%)and right axis deviation with poor R wave progression(24.3%).Atrial fibrillation/flutter was detected in 24.3%.Echocardiography was performed in 97.3%of cases and cardiac MRI in 91.9%of cases.Ejection fraction was reduced in more than a half of patients(56.7%).An associated congenital heart disease was found in 16.2%.Heart failure therapy was administered in 35.1%of patients.The outcome was favorable in the vast majority of patients,with just one death.CONCLUSION ILVAH is a multifaceted entity with a so far unpredictable course,ranging from benign until the elderly to sudden death during adolescence.展开更多
文摘BACKGROUND Third epidermoid tumors are a rare finding. The appearance of these tumors often makes them difficult to diagnose, and thus they require multimodality imaging. CASE SUMMARY A 48-year-old male patient reported to our hospital with complaints of vomiting and severe headache. The patient also complained of involuntary micturition for the past five days. We used a combination of computed tomography (CT) and magnetic resonance imaging (MRI) imaging modalities to confirm the presence of a malignant epidermoid cyst arising from the third ventricle. A contrastenhanced CT of the head demonstrated minimal perilesional enhancement while an MRI revealed a large, lobulated and septated T2 hyperintense mass arising from the third ventricle. The maximum size of the lesion measured 73 mm × 65 mm × 64 mm in size. CONCLUSION Malignant epidermoid arising from the third ventricle in an adult male was reported using a combination of CT, MRI, and MR spectroscopy.
文摘Cardiovascular magnetic resonance (CMR) has become a reference standard for the measure-ment of cardiac volumes, function, and mass. This study aims to reconstruct three dimen-sional modeling of the left ventricle (LV) in pa-tients with heart failure (HF) using CMRtools and thereby derive the LV functional indices. CMR images were acquired in 41 subjects (6 females) with heart failure (HF) and 12 normal controls (4 females). Five comparisons were made (i) nor-mal and dilated heart failure subjects, (ii) male and female normal heart, (iii) male and female dilated heart, (iv) male normal and dilated heart failure and (v) female normal and dilated heart failure. In HF, a significant higher values of EDV (320 刡 79 vs. 126 刡 22 ml, P&amp;amp;amp;amp;lt;0.0001), ESV (255 刡 68 vs. 54 刡 12 ml, P&amp;amp;amp;amp;lt;0.00001) and lower values of EF (20 刡 7 vs. 58 刡 5 %) were found compared that of normal control. There were significant difference on LV EDV and ESV between sex in both normal and HF subjects.
基金This work was supported by the Collaborative Innovation Major Project of Zhengzhou under Grant No.20XTZX06013the National Natural Science Foundation of China under Grant No.61932014.
文摘Deep neural networks(DNNs)have been extensively studied in medical image segmentation.However,existing DNNs often need to train shape models for each object to be segmented,which may yield results that violate cardiac anatomical structure when segmenting cardiac magnetic resonance imaging(MRI).In this paper,we propose a capsulebased neural network,named Seg-CapNet,to model multiple regions simultaneously within a single training process.The Seg-CapNet model consists of the encoder and the decoder.The encoder transforms the input image into feature vectors that represent objects to be segmented by convolutional layers,capsule layers,and fully-connected layers.And the decoder transforms the feature vectors into segmentation masks by up-sampling.Feature maps of each down-sampling layer in the encoder are connected to the corresponding up-sampling layers,which are conducive to the backpropagation of the model.The output vectors of Seg-CapNet contain low-level image features such as grayscale and texture,as well as semantic features including the position and size of the objects,which is beneficial for improving the segmentation accuracy.The proposed model is validated on the open dataset of the Automated Cardiac Diagnosis Challenge 2017(ACDC 2017)and the Sunnybrook Cardiac Magnetic Resonance Imaging(MRI)segmentation challenge.Experimental results show that the mean Dice coefficient of Seg-CapNet is increased by 4.7%and the average Hausdorff distance is reduced by 22%.The proposed model also reduces the model parameters and improves the training speed while obtaining the accurate segmentation of multiple regions.
文摘Neurocysticercosis(NCC) is one of the seven neglected endemic zoonoses targeted by the World Health Organization.It is considered a common infection of the nervous system caused by the Tanenia solium and is known to be the primary cause of preventable epilepsy in many developing countries.NCC is commonly resulted by the ingestion of Tanenia solium eggs after consuming undercooked pork,or contaminated water.The parasite can grow in the brain and spinal cord within the nervous system,causing severe headache and seizures beside other pathological manifestations.Immigration and international travel to endemic countries has made this disease common in the United States.NCC can be diagnosed with computed tomography and magnetic resonance imaging of the brain.The treatment of the NCC including cysticidal drugs(eg.,albendazole and praziquantel),and neurosurgical procedure,depending upon a the situation.A patient of Asian origin came to our clinic with complaints of dizziness,headaches and episodes seizures for the past twelve years without proper diagnosis.The computed tomography and magnetic resonance imaging scans indicated multilobulated cystic mass in the brain with the suspicion of neurocysticercosis.
文摘Background:Many neurophysiological diseases during infancy stage are associated with the morphology and size of the lateral ventricle.This research aims to measure the normal value range of lateral ventricle volume of normal infant and thus provide basic data for clinical treatment.Method:By retrospective analysis of magnetic resonance inspection (MRI) cranial image of 165 infants in the Department of Pediatric Neurosurgery,Beijing Tiantan Hospital,the infants were divided into four groups according to their age,including the first group (1~3 month,n =12),the second group (4~6 month,n =33),the third group (7~9 month,n =51),and the fourth group (10~12 month,n =69).On Neurosoft image workstation,it can measure the sectional area of the lateral ventricle volume at each layer of axis T2W image and calculate the lateral ventricle volume using the Cavalieri method.Moreover,the correlations between lateral ventricle volume and gender,side difference,and month age were analyzed.Results:95% confidence interval of total bilateral ventricle volume of normal infant:11920.22~14,266.28 mm3 for male infant and 9922.22~12,263.17 mm3 for female infant;95% confidence interval of left side ventricle volume:6254.72~7546.94 mm3 for male infant and 5206.03~6479.99 mm3 for female infant;95% confidence interval of right side ventricle volume:5041.56~6743.29 mm3 for male infant and 4695.00~5804.40 mm3 for female infant.The lateral ventricle volume of the male infant was normally larger than that of the female infant (p < 0.05).For both male and female infants,the left side ventricle volume was larger than the right ventricle volume (p < 0.01).There was no significant difference in lateral ventricle volume between infants over 3 months old.Conclusion:The normal value range of lateral ventricle volume of the infant can be obtained via referring MRI image.The lateral ventricle volume of infant varies upon gender and ventricle side.
文摘BACKGROUND Isolated left ventricular apical hypoplasia(ILVAH),also known as truncated left ventricle(LV),is a very unusual cardiomyopathy.It is characterised by a truncated,spherical,and non-apex forming LV.The true apex is occupied by the right ventricle.Due to the rarity of the disease,just a few case reports and limited case series have been published in the field.AIM To analysing the so far 37 reported ILVAH cases worldwide.METHODS The electronic databases PubMed and Scopus were investigated from their establishment up to December 13,2022.RESULTS The majority of cases reported occurred in males(52.7%).Mean age at diagnosis was 26.1±19.6 years.More than a third of the patients were asymptomatic(35.1%).The most usual clinical presentation was breathlessness(40.5%).The most commonly detected electrocardiogram changes were T wave abnormalities(29.7%)and right axis deviation with poor R wave progression(24.3%).Atrial fibrillation/flutter was detected in 24.3%.Echocardiography was performed in 97.3%of cases and cardiac MRI in 91.9%of cases.Ejection fraction was reduced in more than a half of patients(56.7%).An associated congenital heart disease was found in 16.2%.Heart failure therapy was administered in 35.1%of patients.The outcome was favorable in the vast majority of patients,with just one death.CONCLUSION ILVAH is a multifaceted entity with a so far unpredictable course,ranging from benign until the elderly to sudden death during adolescence.