Comparing the Inter-observer Reliability of the Tada Formula among Neurosurgeons While Estimating the Intracerebral Haematoma Volume

Author(s):  
Kai Gong ◽  
Tao Shi ◽  
Lizheng Zhao ◽  
Zhong Xu ◽  
Zhanxiang Wang
2005 ◽  
Vol 33 (1) ◽  
pp. 119-122 ◽  
Author(s):  
WG Liu ◽  
Y Yao ◽  
JY Zhou ◽  
XF Yang

We retrospectively assessed the incidence and time course of enlargement in posttraumatic intracerebral haematoma (PTICH). Computed tomography (CT) scans from 165 patients who underwent a scan within 72 h and a repeat scan within 120 h of the onset of trauma were examined. A semi-automated method using region deformation-based segmentation was used to calculate the haematoma volume. The presence of haematoma enlargement was also determined based on a consensus by five observers. Seventy cases (42%) showed enlargement of the haematoma. The frequency of haematoma enlargement decreased as the interval between the onset of trauma and the initial scan increased. The discriminant value of the ratio of the haematoma volume in the second scan to that in the initial scan was ascertained, and the cut-off value for haematoma enlargement was determined to be 1.45. The radiographic criterion for enlargement in PTICH on CT scan was, therefore, defined as a ≥ 1.45 times increase in haematoma volume.


2017 ◽  
Vol 34 (2) ◽  
pp. 64-75
Author(s):  
Mohammad Nazrul Hossain ◽  
Shahryar Nabi ◽  
Sk Sader Hossain

Background: Treatments of intracerebral hematoma (ICH) are controversial and surgical interventions in spontaneous ICH are required and more accepted. Although advantage of neurosurgical intervention conservative treatment of ICH has not been established, recent reports have suggested favourable effects of blood clot removal after liquefaction by means of urokinase.Objectives: To study the intervention by and out come in without or with complications of Burrhole aspiration treatment after urokinase mediated clot lysis; Study Design : Prospective interventional study. Place and Duration of Study: Departments of Neurosurgery and Radiology & Imaging ,Dhaka Medical College Hospital, Dhaka, Bangladesh from July 2010 to December 2010;Materials &Methods: A total of 30 Bangladeshi patients with spontaneous ICH (Age range: 40-75yrs,Mean age ±SD:59.1±11.52 years, Gender : 22 males, 8 females) full filling the criteria for spontaneous ICH were included in the study. The desired information relevant to the objectives were obtained and recorded carefully using a structured questionnaire; The Patients were treated with Burrhole aspiration after urokinase mediated lysis , evaluated for out come , complications and death and statistically analyzed ;Results: The results on delays of intervention ,types of intervention, doses of urokinase, post-operative changes in haematoma volume, outcome with Glasgow outcome scale(GOS) and GOS at follow–up, complications and death were presented with statistical analyses and significance .The outcome and death were compared with various variables such as hypertension (p <0.05), diabetes mellitus (p< 0.05) primary GOS (P<0.05),site of hematoma (p<0.05),volume of haematoma (p<0.05),ventricular extension of hematoma (p<0.05) and delay from ictus to intervention (p<0.05).Conclusion : It was observed that early treatment (within 24 hours of occurance) by using minimally invasive technique and clot removal by urokinase mediated lysis can improve the consequences especially those with haematoma volume < 40 ml, lobar haematoma and without ventricular extension. Bad prognostic factors were increase of blood pressure, diabetes mellitus, GOS level <8, haematoma in the basal ganglia , ventricular extension of the haematoma volume> 40 ml and delay in intervention. However, the present was conducted with 30 patients only and therefore, studies with larger number of patients are required to draw more meticulous and more definitive conclusions.J Bangladesh Coll Phys Surg 2016; 34(2): 64-75


2003 ◽  
Vol 10 (4) ◽  
pp. 439-443 ◽  
Author(s):  
Jung-Il Lee ◽  
Do-Hyun Nam ◽  
Jong-Soo Kim ◽  
Seung-Chyul Hong ◽  
Hyung-Jin Shin ◽  
...  

Author(s):  
Edoardo Cipolletta ◽  
Emilio Filippucci ◽  
Andrea Di Matteo ◽  
Giulia Tesei ◽  
Micaela Ana Cosatti ◽  
...  

Abstract Purpose i) To assess the inter- and intra-observer reliability of ultrasound (US) in the evaluation of the hyaline cartilage (HC) of the metacarpal head (MH) in patients with rheumatoid arthritis (RA) and in healthy subjects (HS) both qualitatively and quantitatively. ii) To calculate the smallest detectable difference (SDD) of the MH cartilage thickness measurement. iii) To correlate the qualitative scoring system and the quantitative assessment. Materials and Methods US examination was performed on 280 MHs of 20 patients with RA and 15 HS using a very high frequency probe (up to 22 MHz). HC status was evaluated both qualitatively (using a five-grade scoring system) and quantitatively (using the average value of the longitudinal and transverse measures). The HC of MHs from II to V metacarpophalangeal joint of both hands were scanned independently on the same day by two rheumatologists to assess inter-observer reliability. All subjects were re-examined using the same scanning protocol and the same US setting by one sonographer after a week to assess intra-observer reliability. Results The inter-observer agreement and intra-observer agreement were moderate to substantial (k = 0.66 and k = 0.73) for the qualitative scoring system and high (ICC = 0.93 and ICC = 0.94) for the quantitative assessment. The SDD of the MH cartilage thickness measurement was 0.09 mm. A significant correlation between the two scoring systems was found (r = –0.35; p < 0.001). Conclusion The present study describes the main methodological issues of HC assessment. Using a standardized protocol, both the qualitative and the quantitative scoring systems can be reliable.


2020 ◽  
Vol 6 (3) ◽  
pp. 534-537
Author(s):  
Britta König ◽  
Nika Guberina ◽  
Hilmar Kühl ◽  
Waldemar Zylka

AbstractWe investigate the suitability of statistical and model-based iterative reconstruction (IR) algorithm strengths and their influence on image quality and diagnostic performance in low-dose computer tomography (CT) protocols for lung-cancer screening procedures. We evaluate the inter- and intra-observer performance for the assessment of iterative CT reconstruction. Artificial lung foci shaped as spheres and spicules made from material with calibrated Hounsfield units were pressed within layered granules in lung lobes of an anthropomorphic phantom. Adaptively, a soft-tissue- and fat- extension ring were attached. The phantom with foci was scanned using standard high contrast, low-dose and ultra lowdose protocols. For reconstruction the IR algorithm ADMIRE at four different strength levels were used. Two ranking tests and Friedman statistics were performed. Fleiss k and modified Cohen’s kneywere used to quantify inter- and intra-observer performance. In conjunction with the standard lung kernel BL75 radiologists evaluated medium to high IR strength, with preference to S4, as suitable for lung foci detection. When varying reconstruction kernels the ranking became more random than with varying phantom diameter. The inter-observer reliability shows poor to slight agreement expressed by k<0 and k=0-0.20 . For the intra-observer reliability non- agreement with kney=0-0.20and moderate agreement with kney=0.60-0.79 for the first ranking test, and almost perfect agreement with kney>0.90 for the second ranking test was observed. In conclusion, our validation suggests radiological preference of medium to high iteration strengths, especially S4, for lung foci detection. An investigation of the correlation between diagnostic experience and the subjective perception of IR reconstructed CT images still needs to be investigated.


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