Quality of MR thermometry during palliative MR-guided high-intensity focused ultrasound (MR-HIFU) treatment of bone metastases

Table 1 Description of the patient group

Treatment number	Sex	Age	Location	Lesion type	Receiver coil(s)	Number of datasets ^g
1^a,d	M	58	Femur	Osteolytic	HIFU 3-elem	13
2^a,d	M	58	Femur	Osteolytic	HIFU 3-elem	7
3^a	F	55	Sacrum	Osteolytic	HIFU 5-elem	7
4^a	F	56	Pubic bone	Mixed	HIFU 5-elem	11
5^b	M	60	Pubic bone	Osteolytic	HIFU 5-elem	16
6^b,e	F	64	Sacrum	Mixed	HIFU 5-elem	13
7^b	F	53	Shoulder	Osteoblastic	MR Body coil	31
8^c	M	86	Rib	Mixed	HIFU 5-elem	20
9^b,e,f	F	64	Sacrum	Mixed	HIFU 5-elem	23
10^c,f	M	55	Pubic bone	Osteolytic	HIFU 5-elem	27
11^c	M	71	Pubic bone	Osteolytic	HIFU 5-elem	23
12^c	M	65	Rib	Mixed	HIFU 5-elem	15
13^c	M	64	Rib	Osteolytic	HIFU 5-elem	18
Total						224

^aPerformed under PSA type A (fentanyl and midazolam).
^bPerformed under PSA type B (propofol and opioid analgesic).
^cPerformed under PSA type C (propofol and esketamine).
^dSame patient, retreated after 2 weeks, metal internal fixation material in the target region.
^eSame patient, retreated after 4.5 months.
^fHigher resolution MRT scans used.
^gFor each sonication, one dataset was acquired, containing a dynamic series of multi-slice magnitude images, phase images, and calculated temperature maps.

ISSN: 2050-5736