1
|
Zhang P, Cheng J, Liu C, Li W, Wang Y, Zhang N, Wu J, Zhang X, Liu C, Hou Y. Hypersensitive MR Angiography for Diagnosis of Ischemic Stroke and Reperfusion Subarachnoid Hemorrhage. Anal Chem 2024. [PMID: 38980807 DOI: 10.1021/acs.analchem.4c01097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/11/2024]
Abstract
Stroke is an acute injury of the central nervous system caused by the disorders of cerebral blood circulation, which has become one of the major causes of disability and death. Hemorrhage, particularly subarachnoid hemorrhage (SAH), is one of the poorest prognostic factors in stroke, which is related to the thrombolytic therapy, and has been considered very dangerous. In this context, the MR angiography with high sensitivity and resolution has been developed based on biocompatible paramagnetic ultrasmall NaGdF4 nanoprobes. Owing to the appropriate hydrodynamic diameter, the nanoprobe can be confined inside the blood vessels and it only extravasates at the vascular injury site when the bleeding occurs. Relying on this property, the three-dimensional (3D) anatomic structures of artery occlusion of stroke rat can be precisely visualized; reperfusion-related SAH has been successfully visualized and identified. Benefiting from the long blood half-life of the nanoprobe, the observation window of MR angiography can last for the whole period of reperfusion, thereby monitoring the probable SAH in real time during thrombolytic therapy. More importantly, through reconstruction of multiparametric MRI, the arterial occlusion, cerebral ischemic region, and SAH can be simultaneously visualized in vivo in a 3D manner for the first time. Therefore, the current study provides a novel approach for both noninvasive 3D vascular visualization and hemorrhage alert, which possesses great prospects for clinical translation.
Collapse
Affiliation(s)
- Peisen Zhang
- College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China
| | - Junwei Cheng
- College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China
| | - Chuang Liu
- College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China
| | - Wenyue Li
- College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China
| | - Yuqing Wang
- Tsinghua Laboratory of Brain and Intelligence, Tsinghua University, Beijing 100084, China
| | - Ni Zhang
- Department of Psychiatry, West China Hospital of Sichuan University, Chengdu 610041, China
| | - Jin Wu
- Physical Examination Center, The Second Department of Health and Medical Care, China-Japan Friendship Hospital, Beijing 100029, China
| | - Xinyu Zhang
- Physical Examination Center, The Second Department of Health and Medical Care, China-Japan Friendship Hospital, Beijing 100029, China
| | - Chaoyong Liu
- College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China
| | - Yi Hou
- College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China
| |
Collapse
|
2
|
Yamashita K, Hiwatashi A, Togao O, Kondo M, Kikuchi K, Inoguchi T, Maehara J, Kyuragi Y, Honda H. Additive value of "otosclerosis-weighted" images for the CT diagnosis of fenestral otosclerosis. Acta Radiol 2017; 58:1215-1221. [PMID: 28090791 DOI: 10.1177/0284185116687172] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background Otosclerotic foci are usually seen as minute low-density lesions and this may be attributed to relatively low sensitivity on visual assessment using computed tomography (CT). Otosclerotic foci can be detected by using the accurate region of interest (ROI) setting, while small ROI settings by less-experienced radiologists may result in false negative findings. Purpose To evaluate the diagnostic ability of our proposed method ("otosclerosis-weighted" imaging [OWI]), which is based on reversing the density, compared with conventional CT (CCT) imaging alone. Material and Methods Temporal bone CTs of consecutive patients with otosclerosis were analyzed. Gender- and age-matched control participants were also included. All CT images were obtained using a 64-detector row scanner. OWI was obtained by extracting the temporal bone region using the threshold technique and reversing the density (black to white). Four independent radiologists took part in two reading sessions. In the first session, the observers read only CCT imaging. In the second session, they read OWI along with the CCT imaging. Sensitivity was assessed for the four readers. Results Thirty temporal bones of 25 patients with otosclerosis (3 men, 22 women; mean age, 53.9 ± 9.0 years) and 30 temporal bones of 30 control participants (4 men, 26 women; mean age, 44.0 ± 16.2 years) were included. For all observers, reading with a combination of the two methods was associated with a higher sensitivity (63.3-80.0%) than with conventional CT images alone (30.0-60.0%; P < 0.05, each). Conclusion Application of our proposed method based on threshold value may help detect foci of fenestral otosclerosis.
Collapse
Affiliation(s)
- Koji Yamashita
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Akio Hiwatashi
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Osamu Togao
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Masatoshi Kondo
- Department of Medical Technology, Kyushu University Hospital, Fukuoka, Japan
| | - Kazufumi Kikuchi
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Takashi Inoguchi
- Department of Otorhinolaryngology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Junki Maehara
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Yusuke Kyuragi
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Hiroshi Honda
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| |
Collapse
|
3
|
Entwisle T, Perchyonok Y, Fitt G. Thin section magnetic resonance diffusion-weighted imaging in the detection of acute infratentorial stroke. J Med Imaging Radiat Oncol 2016; 60:616-623. [DOI: 10.1111/1754-9485.12490] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2015] [Accepted: 05/28/2016] [Indexed: 11/27/2022]
Affiliation(s)
- Tom Entwisle
- Radiology Department; Austin Health; Heidelberg Victoria Australia
| | | | - Greg Fitt
- Radiology Department; Austin Health; Heidelberg Victoria Australia
| |
Collapse
|
4
|
Srinivasan K, Thomas B, Shah D, Kannath SK, Menon G, Sandhyamani S, Kesavadas C, Kapilamoorthy TR. Quantification of diffusion and anisotropy in intracranial epidermoids using diffusion tensor metrics and p: q tensor decomposition. J Neuroradiol 2016; 43:363-370. [PMID: 27318387 DOI: 10.1016/j.neurad.2016.02.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2015] [Revised: 02/22/2016] [Accepted: 02/24/2016] [Indexed: 10/21/2022]
Abstract
PURPOSE To quantitatively evaluate the diffusion tensor metrics p, q, L and fractional anisotropy in intracranial epidermoids in comparison with normal white matter in the splenium of the corpus callosum. METHODS This retrospective study included 20 consecutive patients referred to our institute. All patients had a magnetic resonance imaging (MRI) study on a 1.5-Tesla MR system. A spin-echo echo-planar DTI sequence with diffusion gradients along 30 non-collinear directions was performed. The eigen values (λ1, λ2, λ3) were computed for each voxel and, using p: q tensor decomposition, the DTI metrics p, q and L-values and fractional anositropy (FA) were calculated. The region of interest (ROI) (6 pixels each) was placed within the lesion in all the cases and in the splenium of the corpus callosum. RESULTS The mean FA in the lesion and splenium were 0.50 and 0.88 respectively, with a statistically significant difference between them (P<0.01). On p: q tensor decomposition, the mean p-value in the epidermoid was 1.55±0.24 and 1.35±0.20 in the splenium; the mean q-values in the epidermoid was 0.67±0.13 and 1.27±0.17 in the splenium; the differences were statistically significant (P=0.01 and <0.01 respectively). The significant difference between p- and q-values in epidermoids compared with the splenium of callosum was probably due to structural and orientation differences in the keratin flakes in epidermoids and white matter bundles in the callosum. However, no significant statistical difference in L-values was noted (P=0.44). CONCLUSION DTI metrics p and q have the potential to quantify the diffusion and anisotropy in various tissues thereby gaining information about their internal architecture. The results also suggest that significant differences of DTI metrics p and q between epidermoid and the splenium of the corpus callosum are due to the difference in structural organization within them.
Collapse
Affiliation(s)
- K Srinivasan
- Department of Imaging Sciences and Interventional Radiology, Sree Chitra Tirunal Institute for Medical Sciences and Technology Trivandrum, India
| | - B Thomas
- Department of Imaging Sciences and Interventional Radiology, Sree Chitra Tirunal Institute for Medical Sciences and Technology Trivandrum, India.
| | - D Shah
- Department of Imaging Sciences and Interventional Radiology, Sree Chitra Tirunal Institute for Medical Sciences and Technology Trivandrum, India
| | - S K Kannath
- Department of Imaging Sciences and Interventional Radiology, Sree Chitra Tirunal Institute for Medical Sciences and Technology Trivandrum, India
| | - G Menon
- Department of Neurosurgery, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Trivandrum, India
| | - S Sandhyamani
- Department of Pathology, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Trivandrum, India
| | - C Kesavadas
- Department of Imaging Sciences and Interventional Radiology, Sree Chitra Tirunal Institute for Medical Sciences and Technology Trivandrum, India
| | - T R Kapilamoorthy
- Department of Imaging Sciences and Interventional Radiology, Sree Chitra Tirunal Institute for Medical Sciences and Technology Trivandrum, India
| |
Collapse
|
5
|
Park SY, Kim CK, Park JJ, Park BK. Exponential apparent diffusion coefficient in evaluating prostate cancer at 3 T: preliminary experience. Br J Radiol 2015; 89:20150470. [PMID: 26653866 DOI: 10.1259/bjr.20150470] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVE To investigate the feasibility of exponential apparent diffusion coefficient (eADC) derived from diffusion-weighted imaging (DWI) in evaluating prostate cancers at 3 T. METHODS 74 consecutive patients with surgically confirmed single peripheral zone (PZ) prostate cancer ≥0.5 cm(3) who underwent pre-operative DWI at 3 T were retrospectively selected. Based on radiological-pathological correlation, eADC and apparent diffusion coefficient (ADC) (×10(-3) mm(2) s(-1)) for the cancers and benign PZ were measured by two independent readers. Tumour eADC or ADC was correlated with Gleason score. Receiver operating characteristic curve analysis was performed to differentiate between Gleason score 6 and 7 or higher, by eADC and ADC. Lesion-to-background contrast ratio was compared between eADC and ADC. RESULTS Mean tumour eADC (0.48-0.50) and ADC (0.72-0.75) were significantly different from those of benign PZ (eADC, 0.20-0.27; ADC, 1.34-1.66), respectively (p < 0.001). A moderate correlation between tumour eADC or ADC and Gleason score was seen. For differentiating between Gleason score 6 and 7 or higher, eADC (0.818-0.883) showed a similar area under the curve with ADC (0.840-0.889) (p > 0.05). Lesion-to-background contrast ratio of eADC (Reader 1, 2.43; Reader 2, 2.23) was significantly greater than that of ADC (Reader 1, 2.21; Reader 2, 2.12) (p < 0.001). CONCLUSION The eADC may offer similar diagnostic utility with ADC in the differentiation of the cancer from benign prostate tissue. Moreover, the eADC appears to allow improved tissue contrast. ADVANCES IN KNOWLEDGE The eADC may be a comparable alternative to ADC for evaluating prostate cancer, with removing T2 shine-through effects from DWI.
Collapse
Affiliation(s)
- Sung Y Park
- 1 Department of Radiology and Center for Imaging Science, Samsung Medical Center, Sungkyunkwan, Seoul, Republic of Korea.,2 Department of Radiology and Research Institute of Radiological Science, Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Chan K Kim
- 1 Department of Radiology and Center for Imaging Science, Samsung Medical Center, Sungkyunkwan, Seoul, Republic of Korea.,3 Department of Medical Device Management & Research, SAIHST, Sungkyunkwan University, Seoul, Republic of Korea
| | - Jung J Park
- 1 Department of Radiology and Center for Imaging Science, Samsung Medical Center, Sungkyunkwan, Seoul, Republic of Korea
| | - Byung K Park
- 1 Department of Radiology and Center for Imaging Science, Samsung Medical Center, Sungkyunkwan, Seoul, Republic of Korea
| |
Collapse
|
6
|
Chen XL, Chen TW, Zhang XM, Li ZL, Li H, Zeng NL, Tang HJ, Pu Y, Chen N, Yang Q, Li L, Xie XY, Hu J. Spleen magnetic resonance diffusion-weighted imaging for quantitative staging hepatic fibrosis in miniature pigs: An initial study. Hepatol Res 2013; 43:1231-40. [PMID: 23421793 DOI: 10.1111/hepr.12076] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/25/2012] [Revised: 01/15/2013] [Accepted: 01/16/2013] [Indexed: 02/05/2023]
Abstract
AIM To determine whether spleen diffusion-weighted imaging (DWI) parameters might classify liver fibrosis stage. METHODS Sixteen miniature pigs were prospectively used to model liver fibrosis, and underwent spleen DWI by using b = 300, 500 and 800 s/mm(2) on 0, 5th, 9th, 16th and 21st weekend after the beginning of modeling. Signal intensity ratio of spleen to paraspinous muscles (S/M), spleen exponential apparent diffusion coefficient (eADC) and apparent diffusion coefficient (ADC) for each b-value were statistically analyzed. RESULTS With increasing stages of fibrosis, S/M for all b-values showed a downward trend; and spleen eADC and ADC for b = 300 s/mm(2) showed downward and upward trends, respectively (all P < 0.05). The area under the receiver-operator curve (AUC) of spleen DWI parameters was 0.777 or more by S/M for classifying each fibrosis stage, and 0.65 or more by eADC and 0.648 or more by ADC for classifying stage ≥3 or cirrhosis. Among the spleen DWI parameters, S/M for b = 300 s/mm(2) was the best parameter in classifying stage 1 or more, 2 or more and 3 or more with AUC of 0.875, 0.851 and 0.843, respectively; and spleen eADC for b = 300 s/mm(2) was best in classifying stage 4 with an AUC of 0.988. CONCLUSION Spleen DWI may be used to stage liver fibrosis.
Collapse
Affiliation(s)
- Xiao-Li Chen
- Sichuan Key Laboratory of Medical Imaging, Department of Radiology, Affiliated Hospital of North Sichuan Medical College, Nanchong, Sichuan, China
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
7
|
Zhang YL, Yu BL, Ren J, Qu K, Wang K, Qiang YQ, Li CX, Sun XW. EADC Values in Diagnosis of Renal Lesions by 3.0 T Diffusion-Weighted Magnetic Resonance Imaging: Compared with the ADC Values. APPLIED MAGNETIC RESONANCE 2013; 44:349-363. [PMID: 23476099 PMCID: PMC3585986 DOI: 10.1007/s00723-012-0376-z] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/22/2012] [Revised: 05/16/2012] [Indexed: 06/01/2023]
Abstract
Exponential apparent diffusion coefficient (EADC) is an indicator of diffusion-weighted imaging (DWI) and reflects the pathological changes of tissues quantitatively. However, no study has been investigated in the space-occupying kidney disease using EADC values. This study aims to evaluate the diagnostic role of EADC values at a high magnetic field strength (3.0 T) in kidney neoplastic lesions, compared with that of the ADC values. Ninety patients with suspected renal tumors (including 101 suspected renal lesions) and 20 healthy volunteers were performed MRI scanning. Diffusion-weighted imaging was performed with a single-shot spin-echo echo-planar imaging (SE-EPI) sequence at a diffusion gradient of b = 500 s/mm2. We found renal cell carcinoma (RCC) can be distinguished from angiomyolipoma, and clear cell carcinoma can be distinguished from non-clear cell carcinoma by EADC value. There was significant difference in overall EADC values between renal cell carcinoma (0.150 ± 0.059) and angiomyolipoma (0.270 ± 0.108) when b value was 500 s/mm2. When receiver operating characteristic (ROC) was higher than 0.192, the sensitivity and specificity of EADC value of renal cell carcinoma were 84.6 and 81.1 %, respectively. In conclusion, EADC map shows the internal structure of the kidney tumor more intuitively than the ADC map dose, and is also in line with the observation habits of the clinicians. EADC can be used as an effective imaging method for tumor diagnosis.
Collapse
Affiliation(s)
- Yue-Lang Zhang
- Department of Imaging, First Affiliated Hospital, Medicine School of Xi’an Jiaotong University, Xi’an, 710061 Shaanxi People’s Republic of China
| | - Bo-Lang Yu
- Department of Imaging, First Affiliated Hospital, Medicine School of Xi’an Jiaotong University, Xi’an, 710061 Shaanxi People’s Republic of China
| | - Juan Ren
- Department of Radiotherapy Oncology, First Affiliated Hospital, Medicine School of Xi’an Jiaotong University, 277 Yanta West Road, Xi’an, 710061 Shaanxi People’s Republic of China
| | - Kai Qu
- Department of Imaging, First Affiliated Hospital, Medicine School of Xi’an Jiaotong University, Xi’an, 710061 Shaanxi People’s Republic of China
| | - Ke Wang
- Department of Imaging, First Affiliated Hospital, Medicine School of Xi’an Jiaotong University, Xi’an, 710061 Shaanxi People’s Republic of China
| | - Yong-Qian Qiang
- Department of Imaging, First Affiliated Hospital, Medicine School of Xi’an Jiaotong University, Xi’an, 710061 Shaanxi People’s Republic of China
| | - Chen-Xia Li
- Department of Imaging, First Affiliated Hospital, Medicine School of Xi’an Jiaotong University, Xi’an, 710061 Shaanxi People’s Republic of China
| | - Xing-Wang Sun
- Department of Imaging, First Affiliated Hospital, Medicine School of Xi’an Jiaotong University, Xi’an, 710061 Shaanxi People’s Republic of China
| |
Collapse
|
8
|
Yeşildağ A, Ayata A, Baykal B, Koroglu M, Yildiz H, Oral B, Oktem F, Oyar O. Magnetic resonance imaging and diffusion-weighted imaging in methylmalonic acidemia. Acta Radiol 2005; 46:101-3. [PMID: 15841747 DOI: 10.1080/02841850510020888] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Methylmalonic acidemia (MMA) is an inborn disorder of amino acid metabolism, often presenting with neurological symptoms. We present the results of magnetic resonance imaging (MRI) and diffusion-weighted imaging (DWI) of the brain in a 16-month-old male patient with classic neurological and laboratory findings for MMA. MRI demonstrated the hyperintensity within globi pallidi both on T2-weighted image and DWI during the acute episode of metabolic acidosis.
Collapse
Affiliation(s)
- A Yeşildağ
- Department of Radiology, Suleyman Demirel University School of Medicine, Isparta, Turkey.
| | | | | | | | | | | | | | | |
Collapse
|
9
|
Fink JN, Kumar S, Horkan C, Linfante I, Selim MH, Caplan LR, Schlaug G. The stroke patient who woke up: clinical and radiological features, including diffusion and perfusion MRI. Stroke 2002; 33:988-93. [PMID: 11935049 DOI: 10.1161/01.str.0000014585.17714.67] [Citation(s) in RCA: 174] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND AND PURPOSE Time of stroke onset is uncertain for patients who wake from sleep with stroke. Functional imaging techniques may allow estimation of benefit and risk of acute stroke therapy. We compared the clinical and multimodal MRI findings of patients with uncertain stroke onset with those with known onset time. METHODS Patients imaged within 24 hours of ischemic stroke onset between January 1997 and June 2000 were identified from a prospective stroke registry. Clinical and imaging data from patients with known stroke onset (group I) were compared with those who woke with stroke (group II). RESULTS A total of 364 patients were identified, of whom 100 (27%) woke from sleep with stroke. Group I and group II did not differ in age, gender, National Institutes of Health Stroke Scale, or TOAST (Trial of Org 10172 in Acute Stroke Treatment) diagnoses. Time from stroke onset was shorter in group I (mean 6.0 versus 13.3 hours, P<0.001); time from detection did not differ between groups (6.0 versus 5.9 hours). Within 3 hours, diffusion-weighted imaging (DWI) and perfusion-weighted imaging (PWI) lesion volumes were similar in both groups; DWI-PWI mismatch was present in 82% of group I and 73% of group II patients. Mean apparent diffusion coefficient of water (ADC) of group I patients was negatively associated with DWI volume (beta=-0.324, P=0.004) and time from stroke onset (beta=-0.238, P=0.031) in multivariate analysis. The mean ADC of group II patients was lower than that of group I patients within 3 hours of stroke detection (mean 556 versus 665 microm2/s, P<0.01), but individual group II patients had ADC values as high as 742 microm2/s, in addition to a DWI-PWI mismatch pattern. CONCLUSIONS Onset time is uncertain in over one quarter of acute ischemic stroke patients. Clinical features of these patients do not differ significantly from those with known onset time. Some patients who wake with stroke seem to have favorable imaging characteristics for acute stroke therapy. Further study is needed to determine whether criteria for therapy based on imaging parameters can safely be applied to these patients.
Collapse
Affiliation(s)
- John N Fink
- Beth Israel Deaconess Medical Center, Boston, Mass 02215, USA
| | | | | | | | | | | | | |
Collapse
|