From 656307c3a2b592274c53cef25042441ee160b3d9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Fernando=20P=C3=A9rez-Garc=C3=ADa?= <fepegar@gmail.com>
Date: Sun, 18 Jan 2026 22:28:28 +0000
Subject: [PATCH] Use abs() to compute maximum in k-space

---
 src/torchio/transforms/augmentation/intensity/random_spike.py | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/src/torchio/transforms/augmentation/intensity/random_spike.py b/src/torchio/transforms/augmentation/intensity/random_spike.py
index ccf6c382..17e63457 100644
--- a/src/torchio/transforms/augmentation/intensity/random_spike.py
+++ b/src/torchio/transforms/augmentation/intensity/random_spike.py
@@ -153,8 +153,7 @@ def add_artifact(
         for index in indices:
             diff = index - mid_shape
             i, j, k = mid_shape + diff
-            # As of torch 1.7, "max is not yet implemented for complex tensors"
-            artifact = spectrum.cpu().numpy().max() * intensity_factor
+            artifact = spectrum.cpu().abs().max() * intensity_factor
             if self.invert_transform:
                 spectrum[i, j, k] -= artifact
             else: