The RDS method has undergone several improvements (Heckathorn [2002], [2007]; [Salganik and Heckathorn 2004]) and is now especially suited to sampling, analyzing, and studying sparse and hidden populations with unclear borders and scales, and anonymous identities (Zhao and Pedersen [2007]).
In case of multiple foci or lesions with unclear borders in PET, a simultaneous evaluation of the MRI data in Visage 7.1 supported the detection/delineation of the primary PC lesion.
However, the initial system had drawbacks such as limitations in the visualization of lesions and unclear borders between normal tissues and malignant lesions [ 1].
We have also been striving to improve our diagnostic system, by correcting its drawbacks such as unfavorable visualization of lesions and unclear borders between normal tissues and malignant lesions [ 1].
37 Tumors that involve the contralateral recess, bilateral extradural lesions, huge neoplasms with scalloping of vertebrae, easily bleeding tumors spreading to both sides, lesions with unclear borders, and intramedullary neoplasms may be difficult to manage using this approach.
After exclusions due to excessive movement (n = 8), failure to complete both sessions (n = 2), or unclear retinotopic borders (n = 1), we report fMRI results of 29 children (magenta symbols, Figure 2A).
It is unclear if the border will stay open, or for how long.
It is unclear whether the border guards are fooled by clever attempts to disguise the shipments as benign or are paid to turn a blind eye, or both.
Turkish authorities deny having a policy of pushing Syrians back – and it is unclear whether Turkish border guards fired knowingly at refugees or whether they acted for security reasons in a region where Isis has tried to gain a foothold.
