The 26-year-old has made 10 appearances this season, and Spurs want to retain him as cover for Egypt's Mido during the African Nations Cup.
Town boss Joe Royle is looking for a new striker after Sam Parkin was ruled out until March with a broken ankle.
Rasiak, who is eager for first-team football ahead of the World Cup, was also linked with a loan to Derby.
"I did ask about Rasiak but I can understand Tottenham's position right now," said Royle.
"They've got a great season going there and will be losing Mido when he goes off to play in the African Nations Cup."
Rasiak?
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