evaluating quantitative measures of tumor burden in serial imaging studies or describing methods...
*Assignment of CR or PR ideally confirmed with serial imaging studies performed at least 4 weeks apart; if not confirmed with repeat imaging, an assignment of SD is given.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3949168/

In order to achieve
real-time volume rates, the method must move from a serial acquisition
scheme to a highly parallel scheme in which multiple receive beams are
simultaneously formed in parallel.
https://www.siemens.com.tr/i/Assets/saglik/Whitepaper_Bradle...

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Note added at 19 mins (2018-08-08 09:37:13 GMT)
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Breast Ultrasound, An Issue of Ultrasound Clinics - E-Book
https://tinyurl.com/y8rfkkwp

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Note added at 5 days (2018-08-13 10:38:01 GMT) Post-grading
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Better extracts from the first two links:
1.
Perfusion Imaging
Multiple methods of acquiring perfusion data with CT or MR have been developed, which involve serial acquisition of images in the same anatomic location...
As opposed to a serial or “line-by-line”
acquisition design, this is a parallel or “subvolume-by-subvolume” design.

2.
In order to achieve real-time volume rates, the method must move from a serial acquisition scheme to a highly parallel scheme in which multiple receive beams are
simultaneously formed in parallel. As opposed to a serial or “line-by-line”
acquisition design, this is a parallel or “subvolume-by-subvolume” design.

...so typically a very small number of simultaneous receive beams are formed
(usually one or two) following each transmit event. This
translates to a serial or line-by-line acquisition scenario.
In real-time 3D imaging, on the other hand, a substantial
number of receive beams are formed in parallel following
each transmit event.

"serial imaging" is also used, of course