Comparison of topographic correction methods on SPOT-6/7 multispectral data in Indonesia: an initial evaluation in hilly to undulating area

2021 ◽  
Author(s):  
Athar Abdurrahman Bayanuddin ◽  
Zylshal Zylshal ◽  
Ferman Setia Nugroho ◽  
Sukentyas Estuti Siwi ◽  
Mulia Inda Rahayu ◽  
...  
Keyword(s):  
Initial Evaluation ◽  
Topographic Correction ◽  
Multispectral Data

An initial evaluation of the Iowa Dental Surgical Simulator

2000 ◽  
Vol 64 (12) ◽  
pp. 847-853 ◽  
Author(s):  
L Johnson ◽  
G Thomas ◽  
S Dow ◽  
C Stanford
Keyword(s):  
Initial Evaluation ◽  
Surgical Simulator

Initial evaluation of the effectiveness of individual and group plus individual (combined) treatment

2013 ◽  
Author(s):  
Halley J. Brown ◽  
Lois A. Huebner ◽  
Zac E. Imel ◽  
Alexandra R. Kelly ◽  
Elizabeth Duszak ◽  
...  
Keyword(s):  
Combined Treatment ◽  
Initial Evaluation

Robust Multispectral Data Hiding in RGB Image Using Digital Watermarking

2016 ◽  
Vol 2016 (1) ◽  
pp. 213-218
Author(s):  
Kazushige Banzawa ◽  
Kazuma Shinoda ◽  
Madoka Hasegawa
Keyword(s):  
Digital Watermarking ◽  
Data Hiding ◽  
Multispectral Data ◽  
Rgb Image

Patients with “benign” Chiari I malformations require surgical decompression at a low rate

2019 ◽  
Vol 23 (4) ◽  
pp. 498-506 ◽  
Author(s):  
Tofey J. Leon ◽  
Elizabeth N. Kuhn ◽  
Anastasia A. Arynchyna ◽  
Burkely P. Smith ◽  
R. Shane Tubbs ◽  
...  
Keyword(s):  
Surgical Treatment ◽  
Posterior Fossa ◽  
Multivariate Logistic Regression Analysis ◽  
Large Cohort ◽  
Initial Evaluation ◽  
Published Data ◽  
Posterior Fossa Decompression ◽  
Signal Abnormality ◽  
Chiari I

OBJECTIVEThere are sparse published data on the natural history of “benign” Chiari I malformation (CM-I)—i.e., Chiari with minimal or no symptoms at presentation and no imaging evidence of syrinx, hydrocephalus, or spinal cord signal abnormality. The purpose of this study was to review a large cohort of children with benign CM-I and to determine whether these children become symptomatic and require surgical treatment.METHODSPatients were identified from institutional outpatient records using International Classification of Diseases, 9th Revision, diagnosis codes for CM-I from 1996 to 2016. After review of the medical records, patients were excluded if they 1) did not have a diagnosis of CM-I, 2) were not evaluated by a neurosurgeon, 3) had previously undergone posterior fossa decompression, or 4) had imaging evidence of syringomyelia at their first appointment. To include only patients with benign Chiari (without syrinx or classic Chiari symptoms that could prompt immediate intervention), any patient who underwent decompression within 9 months of initial evaluation was excluded. After a detailed chart review, patients were excluded if they had classical Chiari malformation symptoms at presentation. The authors then determined what changes in the clinical picture prompted surgical treatment. Patients were excluded from the multivariate logistic regression analysis if they had missing data such as race and insurance; however, these patients were included in the overall survival analysis.RESULTSA total of 427 patients were included for analysis with a median follow-up duration of 25.5 months (range 0.17–179.1 months) after initial evaluation. Fifteen patients had surgery at a median time of 21.0 months (range 11.3–139.3 months) after initial evaluation. The most common indications for surgery were tussive headache in 5 (33.3%), syringomyelia in 5 (33.3%), and nontussive headache in 5 (33.3%). Using the Kaplan-Meier method, rate of freedom from posterior fossa decompression was 95.8%, 94.1%, and 93.1% at 3, 5, and 10 years, respectively.CONCLUSIONSAmong a large cohort of patients with benign CM-I, progression of imaging abnormalities or symptoms that warrant surgical treatment is infrequent. Therefore, these patients should be managed conservatively. However, clinical follow-up of such individuals is justified, as there is a low, but nonzero, rate of new symptom or syringomyelia development. Future analyses will determine whether imaging or clinical features present at initial evaluation are associated with progression and future need for treatment.

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