** Shares of portable MRI maker Hyperfine HYPR.O down 22.3% in extended trading to $1.71 after announcing planned equity raise and preliminary Q3 results

** Guilford, Connecticut-based Hyperfine commences offering of stock and pre-funded warrants without disclosing deal size

** It says expects Q3 rev of $3.4 mln following launch of its next generation Swoop system

** The consensus estimate among 3 analysts called for rev of $3.5 mln, per LSEG data

** Co expects to use proceeds from equity offering for working capital and general purposes, including commercial, manufacturing, and R&D activities, according to the prospectus

** Hyperfine has about 78.6 mln shares outstanding for roughly $170 mln market cap

** Lake Street Capital Markets is sole bookrunner for the offering

** HYPR shares on Weds ended up 7.3% at $2.20, up 150% YTD

** 2 analysts rate shares "buy" and 1 has "hold" with PTs of $0.85, $1.40 and $2.00, per LSEG

(Lance Tupper is a Reuters market analyst. The views expressed are his own)

((lance.tupper@tr.com 1-646-279-6380))