High resolution MR eye protocol optimization: Comparison between 3D-CISS, 3D-PSIF and 3D-VIBE sequences

Tsiapa, Irene; Tsilimbaris, Miltiadis K.; Papadaki, Efrosini; Bouziotis, Penelope; Pallikaris, Ioannis G.; Karantanas, Apostolos H.; Maris, Thomas G.

doi:10.1016/j.ejmp.2015.03.009

Cited by 8 publications

(5 citation statements)

References 32 publications

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“…The same imaging protocol was applied for the sheep craniums and for human subjects. The 3D-VIBE sequence was selected for measurements as it provides the best overall image quality[ 23 ] and has been evaluated for osseous tissue abnormalities. [ 24 ]…”

Section: Methodsmentioning

confidence: 99%

Orbital volume measurements from magnetic resonance images using the techniques of manual planimetry and stereology

Bontzos

Mazonakis

Papadaki

et al. 2020

Natl J Maxillofac Surg

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Introduction: Current volume measurement techniques, for the orbit, are time-consuming and involve complex assessments, which prevents their routine clinical use. In this study, we evaluate the applicability and efficacy of stereology and planimetry in orbital volume measurements using magnetic resonance imaging (MRI). Materials and Methods: Prospective imaging study using MRI. Sheep craniums and human subjects were evaluated. Water-filling measurements were performed in animal skulls, as the standard validation technique. Planimetry and stereology techniques were used in each dataset. Intraobserver and interobserver reliability testing were applied. Results: In stereology customization, 1/6 systematic sampling scheme was determined as optimal with acceptable coefficient of error (3.09%) and low measurement time (1.2 min). In sheep craniums, the mean volume measured by water displacement, planimetry, and stereology was 17.81 ± 0.59 cm 3 , 18.53 ± 0.24 cm 3 , and 19.19 ± 0.17 cm 3 , respectively. Planimetric and stereological methods were highly correlated ( r = 0.94; P ≈ 0.001). The mean difference of the orbital volume using planimetry and stereology was 0.316 ± 0.168 cm 3 . In human subjects, using stereology, the mean orbital volume was found to be 19.62 ± 0.2 cm 3 with a CE of 3.91 ± 0.15%. Conclusions: The optimized stereological method was found superior to manual planimetry in terms of user effort and time spent. Stereology sampling of 1/6 was successfully applied in human subjects and showed strong correlation with manual planimetry. However, optimized stereological method tended to overestimate the orbital volume by about 1 cc, a considerable limitation to be taken in clinical practice.

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Section: Methodsmentioning

confidence: 99%

Orbital volume measurements from magnetic resonance images using the techniques of manual planimetry and stereology

Bontzos

Mazonakis

Papadaki

et al. 2020

Natl J Maxillofac Surg

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“…One of these studies which is also published in this issue is that of Tsiapa et al [27]. The study quantitatively and qualitatively compared various sequences in High-Resolution Magnetic Resonance Imaging (HR-MRI) of the eye utilizing a 1.5T whole body imaging system (the eye is the ideal tissue for HR-MRI because of its wide variation in water content particularly and specially due to the need for high spatial resolution in extremely small field of view).…”

Section: Non Ionizing Radiationmentioning

confidence: 99%

Medical Physics: Forming and testing solutions to clinical problems

Tsapaki

Bayford

2015

Physica Medica

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“…1d). The final image voxel dimensions were 0.1 × 0.1 mm 2 in-plane spatial resolution and 0.6 mm cross-plane spatial resolution (slice thickness) as previously described [15, 16]. Axial space filling sequences of 0.6 mm were obtained using a 256 × 224 matrix over a 5 × 4.5 cm field of view.…”

Section: Methodsmentioning

confidence: 99%

“…The clarity of tumor border definition in all sequences and orientations (axial, sagittal, coronal) as well as the presence of artifacts was rated subjectively utilizing a 5-point scale, as previously described [15]. …”

Section: Methodsmentioning

confidence: 99%

Surface-Coil MRI for Small Peripheral Choroidal Melanoma: Imaging in a Rabbit Eye Model

et al. 2018

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Introduction: Imaging of small peripheral choroidal melanomas remains challenging in clinical and experimental settings, requiring wide-field ophthalmoscopy modalities. In this study, we applied surface-coil MRI to assess imaging feasibility for small peripherally located choroidal melanoma in a rabbit eye model. Methods: A female albino rabbit with a body weight of 2.8 kg was immunosuppressed with intramuscular cyclosporine 15 mg/kg daily for 3 days prior to inoculation of 14 million 92.1 line melanoma cells into the peripheral suprachoroidal space of the right eye. The experimental animal continued to receive the same dosage of cyclosporine daily for 26 days postinoculation until the day of sacrifice. On that interval, it underwent surface-coil MRI scanning using various protocols and models subsequently sacrificed to allow histological evaluation. A comparative examination of various MRI sequences for optimal lesion imaging was performed, based on semiquantitative criteria. Results: Imaging quality and superimposed artifacts varied across different sequences and the optimal tumor delineation from adjacent tissues was achieved in T1-weighted sequences. Conclusions: MRI of small peripheral choroidal melanomas is feasible in a rabbit model using surface coils, particularly in T1-weighted sequences. Findings may be used as a basis for further development of this technique for experimental and clinical applications.

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High resolution MR eye protocol optimization: Comparison between 3D-CISS, 3D-PSIF and 3D-VIBE sequences

Cited by 8 publications

References 32 publications

Orbital volume measurements from magnetic resonance images using the techniques of manual planimetry and stereology

Orbital volume measurements from magnetic resonance images using the techniques of manual planimetry and stereology

Medical Physics: Forming and testing solutions to clinical problems

Surface-Coil MRI for Small Peripheral Choroidal Melanoma: Imaging in a Rabbit Eye Model

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