Effect of the Water Bolus and Tissue Thickness Over the Heat Distribution Generated by a RF Applicator Used as an Auxiliar to Treat Bone Tumors

Whole-body scintigraphy with both 99mTc-phosphonate and 67Ga was performed on 92 patients suspected of primary bone tumors. In 46 patients with primary malignant bone tumors, scintigraphy with 99mTc-phosphonate disclosed the primary tumor in 44 cases and skeletal metastases in 11, and 67Ga scintigraphy detected the primary tumor in 43 cases, skeletal metastases in 6 cases and soft-tissue metastases in 8 cases. In 25 patients with secondary malignant bone tumors, bone scintigraphy visualized a single lesion in 10 cases and several lesions in 15 cases, and 67Ga scintigraphy detected the primary tumor in 17 cases, skeletal metastases in 17 cases and soft-tissue metastases in 9 cases. In 21 patients with benign bone disease positive uptake of 99mTc-phosphonate was recognized in 19 cases and uptake of 67Ga in 17 cases. It is concluded that bone scintigraphy should be used in patients suspected of primary bone tumors. If malignancy is suspected, 67Ga scintigraphy should be performed in addition.

Download Full-text

MR-Derived CT-Like Images and Simulated Radiographs versus Conventional Radiography in Patients with Benign and Malignant Bone Tumors

10.1055/s-0038-1639518 ◽

2018 ◽

Author(s):

Alexandra Gersing ◽

Daniela Muenzel ◽

Felix Kopp ◽

Benedikt Schwaiger ◽

Carolin Knebel ◽

...

Keyword(s):

Bone Tumors ◽

Conventional Radiography ◽

Malignant Bone Tumors

Download Full-text

Computed tomography analysis of primary bone tumors : the significance in the evaluation of destructive lesionsof pelvic bone

Journal of the Korean Radiological Society ◽

10.3348/jkrs.1988.24.4.648 ◽

1988 ◽

Vol 24 (4) ◽

pp. 648

Author(s):

J S Suh ◽

E J Lee ◽

C Y Park

Keyword(s):

Computed Tomography ◽

Bone Tumors ◽

Pelvic Bone ◽

Primary Bone Tumors ◽

Primary Bone ◽

Tomography Analysis

Download Full-text

Analysis of anterior soft tissue thickness using ultrasonogram, body mass index and neck circumference in predicting difficult intubation

MedPulse International Journal of Anesthesology ◽

10.26611/1015718 ◽

2018 ◽

Vol 7 (1) ◽

pp. 40-42

Author(s):

B Ravindran ◽

◽

V Murali Magesh ◽

B Vignesh ◽

K Vinoth Kumar ◽

...

Keyword(s):

Body Mass Index ◽

Soft Tissue ◽

Body Mass ◽

Difficult Intubation ◽

Neck Circumference ◽

Tissue Thickness ◽

Soft Tissue Thickness

Download Full-text

Measuring Soft Tissue Thickness by CBCT

Case Medical Research ◽

10.31525/ct1-nct03932357 ◽

2019 ◽

Author(s):

Keyword(s):

Soft Tissue ◽

Tissue Thickness ◽

Soft Tissue Thickness

Download Full-text

Accuracy of robot-assisted versus optical frameless navigated stereoelectroencephalography electrode placement in children

Journal of Neurosurgery Pediatrics ◽

10.3171/2018.10.peds18227 ◽

2019 ◽

Vol 23 (3) ◽

pp. 297-302 ◽

Cited By ~ 11

Author(s):

Julia D. Sharma ◽

Kiran K. Seunarine ◽

Muhammad Zubair Tahir ◽

Martin M. Tisdall

Keyword(s):

Soft Tissue ◽

Entry Point ◽

Electrode Placement ◽

Target Point ◽

Localization Error ◽

Bone Thickness ◽

Tissue Thickness ◽

Robot Assisted ◽

Soft Tissue Thickness ◽

Safety Margins

OBJECTIVEThe aim of this study was to compare the accuracy of optical frameless neuronavigation (ON) and robot-assisted (RA) stereoelectroencephalography (SEEG) electrode placement in children, and to identify factors that might increase the risk of misplacement.METHODSThe authors undertook a retrospective review of all children who underwent SEEG at their institution. Twenty children were identified who underwent stereotactic placement of a total of 218 electrodes. Six procedures were performed using ON and 14 were placed using a robotic assistant. Placement error was calculated at cortical entry and at the target by calculating the Euclidean distance between the electrode and the planned cortical entry and target points. The Mann-Whitney U-test was used to compare the results for ON and RA placement accuracy. For each electrode placed using robotic assistance, extracranial soft-tissue thickness, bone thickness, and intracranial length were measured. Entry angle of electrode to bone was calculated using stereotactic coordinates. A stepwise linear regression model was used to test for variables that significantly influenced placement error.RESULTSBetween 8 and 17 electrodes (median 10 electrodes) were placed per patient. Median target point localization error was 4.5 mm (interquartile range [IQR] 2.8–6.1 mm) for ON and 1.07 mm (IQR 0.71–1.59) for RA placement. Median entry point localization error was 5.5 mm (IQR 4.0–6.4) for ON and 0.71 mm (IQR 0.47–1.03) for RA placement. The difference in accuracy between Stealth-guided (ON) and RA placement was highly significant for both cortical entry point and target (p < 0.0001 for both). Increased soft-tissue thickness and intracranial length reduced accuracy at the target. Increased soft-tissue thickness, bone thickness, and younger age reduced accuracy at entry. There were no complications.CONCLUSIONSRA stereotactic electrode placement is highly accurate and is significantly more accurate than ON. Larger safety margins away from vascular structures should be used when placing deep electrodes in young children and for trajectories that pass through thicker soft tissues such as the temporal region.

Download Full-text

CRYOSURGERY IN THE TREATMENT OF PATIENTS WITH BONE TUMORS

Problems in oncology ◽

10.37469/0507-3758-2019-65-2-165-171 ◽

2019 ◽

Vol 65 (2) ◽

pp. 165-171

Author(s):

Aleksey Belyaev ◽

Georgiy Prokhorov ◽

Anna Arkhitskaya

Keyword(s):

Liquid Nitrogen ◽

Bone Tumors ◽

Cryogenic Treatment ◽

Long Term Results ◽

Bone Lesions ◽

Giant Cell Tumors ◽

Primary Bone Tumors ◽

Circulation Circuit ◽

Recent Emergence ◽

Primary Bone

A review of the literature shows that surgical procedures will remain the standard treatment for primary bone tumors. Analysis of studies on the assessment of long-term results shows that additional double cryogenic treatment of the curettage cavity can improve the treatment outcomes of patients with giant cell tumors, dysplastic diseases and some forms of malignant lesions. The traditional execution of the procedure is associated with the open installation of liquid nitrogen in the bone cavity, which requires special skills in handling aggressive refrigerant from the staff and does not exclude complications. In case of multiple metastatic bone lesions, surgical treatment is not indicated. The recent emergence in clinical practice of new equipment with a closed liquid nitrogen circulation circuit inside cryoprobes resumes interest in cryoabla-tion of bone tumor lesions using modern minimally invasive puncture cryotechnology and expanding indications for its use in patients with severe comorbidities.

Download Full-text