Auxiliary Image Sequences in IMF

Gillian Reston; Ulrich Du Bosque; Rowan De Pomerai; Dan Tatut; Tim Davis; Andrew Dunne

doi:10.5594/m001880

Jan 1, 2019
Gillian Reston +5 more

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Abstract

This paper describes an auxiliary image sequence plug-in that enhances SMPTE ST 2067, SMPTE TSP 2121 suit of documents to enable compositing workflows through the use of the Interoperable Master Format (IMF). — The component-based nature of IMF allows multiple versions of a programme to be created, managed and distributed more efficiently. However, it is currently limited to a single concurrent video track in any composition; a restriction which limits certain use cases that could otherwise realise the benefit of IMF's full capabilities. — Our primary use case for the auxiliary image sequence is the management of sign-interpreted programming. This currently necessitates the creation of a new full-length master for each version created. Instead it is proposed that the video of the sign interpreter will be stored as a separate component. This will allow the implementer to be composited with the main programme when required. — A working prototype of a simple compositing processes has been developed by the DPP in partnership with its member companies. Opportunities for more complex and dynamic compositing via Output Profile List (OPL) and time-variant metadata are also discussed in the paper, along with other use-cases for the functionality described. — The plug-in described in this paper will provide benefit to the implementer throughout the IMF lifecycle by enabling storage, editing, re-positioning and processing of the auxiliary image sequence before compositing.

Research Article
4
10.7759/cureus.24918

Susceptibility Weighted Imaging: An Effective Auxiliary Sequence That Enhances Insight Into the Imaging of Stroke

May 11, 2022
Cureus
Sanjay M Khaladkar + 5 more +5

Aim: To evaluate the utility of susceptibility-weighted imaging (SWI) sequence in stroke imaging and assess supplemental information provided by SWI in an acute stroke scenario.Materials and methods: In this study, the appearance of cerebrovascular stroke on the SWI images were analyzed in 50 patients who presented with acute-onset neurological symptoms.Results: Brain MRI with SWI was performed on 50 patients presenting with acute neurological symptoms. The majority were males, 32/50 (64%) and 18/50 (36%) were females. Most of the patients were in the age group > 60 years (36%), followed by 50-60 years (22%). Most of the patients had bilateral pathology, 20 (40%). The majority of patients had supratentorial lesions 34 (68%). Among 50 patients, the majority of patients had arterial stroke 20 (40%) and cerebral venous sinus thrombosis (CVST) 20 (40%) followed by amyloid angiopathy five (10%), and five (10%) had hypertensive microhemorrhage. Among the 20 patients with arterial stroke, the majority had middle cerebral artery (MCA) thrombosis 10 (50%) and among the 20 patients with venous thrombosis, eight (40%) patients had hemorrhagic infarcts. SWI was better as compared to computed tomography (CT) (P<0.05) in the detection of hemorrhagic transformation of arterial infarct, cerebral hemorrhagic venous sinus thrombosis, hemorrhagic venous infarct, hypertensive microhemorrhage, and cerebral amyloid angiopathy.Conclusion: SWI is a useful imaging sequence that provides additional information on stroke patients. SWI requires only an additional three-four minutes to perform and can be easily incorporated into standard stroke protocol. SWI can identify various features such as hemorrhage, intraarterial thrombus, or concomitant microbleeds that are of prognostic value and affect therapeutic decisions.